{"title":"Oxides and Carbonates","description":"\u003cdiv class=\"rm-type-pills\" style=\"margin:16px 0 8px;\"\u003e\n\u003ca href=\"\/collections\/raw-materials-and-ceramic-chemicals\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eAll Raw Materials\u003c\/a\u003e\u003ca href=\"\/collections\/mason-stains\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eMason Stains\u003c\/a\u003e\u003ca href=\"\/collections\/raw-materials-frits\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eFrits\u003c\/a\u003e\u003ca href=\"\/collections\/raw-materials-feldspars\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eFeldspars\u003c\/a\u003e\u003ca href=\"\/collections\/raw-materials-clays-and-kaolins\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eClays and Kaolins\u003c\/a\u003e\u003ca href=\"\/collections\/raw-materials-oxides-and-carbonates\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#2b5f8a;color:#ffffff;\"\u003eOxides and Carbonates\u003c\/a\u003e\u003ca href=\"\/collections\/raw-materials-silica-grogs-and-refractories\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eSilica, Grogs and Refractories\u003c\/a\u003e\u003ca href=\"\/collections\/raw-materials-additives\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003eAdditives\u003c\/a\u003e\u003ca href=\"\/collections\/us-gypsum-usg-plaster-information\" style=\"display:inline-block;padding:8px 18px;margin:0 8px 10px 0;border:1px solid #2b5f8a;border-radius:999px;font-size:15px;line-height:1.3;text-decoration:none;background:#ffffff;color:#2b5f8a;\"\u003ePlasters\u003c\/a\u003e\n\u003c\/div\u003e","products":[{"product_id":"magnesium-carbonate-1-pound-currently-out-of-stock","title":"Magnesium Carbonate","description":"\u003ch2 class=\"abz-seo-product\"\u003eKey Features \u0026amp; Benefits:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePurified inorganic compound: magnesium carbonate (MgCO₃) — white, odorless powder. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExcellent versatility: acts as a filler, drying agent, antacid raw material, absorbing agent or sports chalk base. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConvenient size: 1-pound (≈ 0.45 kg) bag — small enough for specialist users, labs, studios or boutique production.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh technical grade quality: suitable for numerous industrial, cosmetic and sports-related uses.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUS-based shipping: stored and dispatched from Sheffield, United States — streamlined logistics for domestic buyers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eTypical Applications:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSports \u0026amp; Fitness Chalk\u003c\/strong\u003e: Known in climbing, gymnastics, weight-lifting as “chalk” because magnesium carbonate dries hands, improving grip.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCosmetics \u0026amp; Personal Care\u003c\/strong\u003e: Used as filler, absorbing powder and anti-caking agent in face powders, body powders and mattifying cosmetic blends. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Fillers \u0026amp; Reinforcements\u003c\/strong\u003e: Serves as filler in rubber\/plastic composites, paper, refractory materials, glass and ceramics.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eChemical \u0026amp; Manufacturing Use\u003c\/strong\u003e: Source for magnesium oxide production (via calcination), or used as base chemical raw material. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eTechnical \u0026amp; Handling Info:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eChemical Formula: MgCO₃. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAppearance: White powder, odourless, insoluble in water (but reactive with acids). \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStorage: Keep dry, sealed and away from strong acids or incompatible chemicals; moisture control recommended.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSafety: Although non-toxic in many applications, wear appropriate PPE (dust mask, eyewear) when handling fine powders; avoid inhalation and keep away from children if used in sports or cosmetic environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePackaging: Supplied in sealed bag, clearly labelled with chemical name and weight.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eWhy Choose This Product?\u003c\/h2\u003e\n\u003cp\u003eFor industrial formulators, cosmetic-blend developers, sport chalk producers or boutique lab users — this 1-pound format offers an optimal size: large enough for meaningful use, small enough to avoid excess inventory. Backed by quality raw-material provenance and shipped domestically from Sheffield, US, it provides reliability, flexibility and ease of use.\u003c\/p\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eUse \u0026amp; Application Tips (Staff-College-style “Order of Battle”):\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRecon \u0026amp; Setup\u003c\/strong\u003e: Establish your specific use-case (chalk, filler, cosmetic additive, chemical feed). Confirm compatibility of magnesium carbonate with your formulation matrix.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDeployment\u003c\/strong\u003e: Weigh out required amount; if blending, ensure uniform dispersion (especially for fillers or cosmetic powders). For sports-chalk use: dust hands or mixing bin lightly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMonitoring \u0026amp; Adjustments\u003c\/strong\u003e: Because magnesium carbonate offers different behaviour (absorption, flow, dust) compared to alternatives, test for flow, clumping, moisture uptake or aesthetic finish.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAfter-Action Maintenance\u003c\/strong\u003e: Reseal remaining product promptly, store in dry environment; label bag for “technical use – magnesium carbonate powder”.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eContingency \/ Scaling\u003c\/strong\u003e: Keep small sample for reference and future lot comparison. For larger scale use, consider contacting for bulk \/ higher grade options.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eQuestions?\u003c\/strong\u003e Call us at 1-888-774-2529.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52801847624051,"sku":"RMMAGCAR","price":22.25,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52801847656819,"sku":"RMMAGCAR-5","price":102.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52801847689587,"sku":"RMMAGCAR10","price":197.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52801847722355,"sku":"RMMAGCAR25","price":472.5,"currency_code":"USD","in_stock":true},{"title":"33 Pounds","offer_id":52801847755123,"sku":"RMMAGCAR50","price":564.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Magnesium-Carbonate-2.jpg?v=1754317681"},{"product_id":"alumina-hydrate-5-pounds-rmaluhyd5","title":"Alumina Hydrate","description":"\u003cspan\u003e\u003c\/span\u003eALUMINA HYDRATE 5 Pounds\u003cbr\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286214541683,"sku":"RMALUHYDAH280A-1","price":4.0,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45105252401474,"sku":"RMALUHYD5","price":17.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286214574451,"sku":"RMALUHYD10LB","price":34.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286214607219,"sku":"RMALUHYDAH280A-25","price":82.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286214639987,"sku":"RMALUHYD50","price":82.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/large-alumina_hydrate_powder_35553fe1-7b75-4a87-8b99-286fdacc6832.jpg?v=1693509911"},{"product_id":"bone-ash-synthetic-1-lb-rmbonashs","title":"Bone Ash, Synthetic","description":"\u003cspan\u003e\u003c\/span\u003eSynthetic Bone Ash  - 1 lb","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45105253908802,"sku":"RMBONASHS","price":17.55,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286206775667,"sku":"RMBONASHS-5","price":85.25,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286206808435,"sku":"RMBONASHS-10","price":169.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286206841203,"sku":"RMBONASHS-25","price":422.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286206873971,"sku":"RMBONASHS-50","price":421.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/600_BoneAsh_800x_e27dcc30-0d63-4af7-84e9-8f9d8c6cb8e6.jpg?v=1693508523"},{"product_id":"dolomite-limestone-10-pound-bag-rmdolomi","title":"Dolomite","description":"\u003cp\u003e\u003cspan\u003e\u003c\/span\u003eDolomite (Limestone).\u003cbr\u003e\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"5 Pounds","offer_id":67286206218611,"sku":"RMDOLOMI-5","price":5.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":45105260265794,"sku":"RMDOLOMI","price":9.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286206251379,"sku":"RMDOLOMI-25","price":20.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286206284147,"sku":"RMDOLOMI50","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/il_570xN.4751156004_mos9_2_1fd824d9-e371-4853-a0bb-a99cf6297d55.jpg?v=1791876103"},{"product_id":"iron-chromate-1lb-rmirochr","title":"Iron Chromate","description":"\u003cp\u003e\u003cstrong\u003eA dark colorant for grays, browns and blacks in glazes, slips and clay bodies.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA dark powder made of iron and chrome. It gives grays, browns and blacks, depending on the glaze. Potters also mix it into clay or slip to make dark or speckled clay bodies.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIn a glaze, start at 1 to 2% (1 to 2 grams per 100 grams of dry glaze) and test.\u003c\/li\u003e\n\u003cli\u003eIn clay or slip, start around 2% for a gray body and add more for darker color.\u003c\/li\u003e\n\u003cli\u003eLike chrome oxide, it can turn tin-bearing glazes pink, in the same pot or in the same kiln.\u003c\/li\u003e\n\u003cli\u003eFire a test tile before you use it on finished work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIron chromite (FeCr₂O₄ type). Refractory.\u003c\/li\u003e\n\u003cli\u003eGives warm grays and browns in most bases. Blacks come from combining it with cobalt and manganese.\u003c\/li\u003e\n\u003cli\u003eAvoid tin in the same glaze unless you want pinks or tans; zinc pushes it toward brown.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eContains chromium. Don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eFor functional ware, use a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$3.35\u003c\/td\u003e\n\u003ctd\u003e$3.35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$16.00\u003c\/td\u003e\n\u003ctd\u003e$3.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$31.00\u003c\/td\u003e\n\u003ctd\u003e$3.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$75.00\u003c\/td\u003e\n\u003ctd\u003e$3.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$133.00\u003c\/td\u003e\n\u003ctd\u003e$2.66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials. That total sets the price level for every bag. For example, ten 50 lb bags of any materials add up to 500 lb, so each bag gets the 500 lb price. Smaller sizes don't count toward the total.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFull-bag pounds in your order\u003c\/th\u003e\n\u003cth\u003ePrice per 50 lb bag\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnder 500 lb\u003c\/td\u003e\n\u003ctd\u003e$133.00\u003c\/td\u003e\n\u003ctd\u003e$2.66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 lb and up\u003c\/td\u003e\n\u003ctd\u003e$130.50\u003c\/td\u003e\n\u003ctd\u003e$2.61\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$128.00\u003c\/td\u003e\n\u003ctd\u003e$2.56\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$125.50\u003c\/td\u003e\n\u003ctd\u003e$2.51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$122.50\u003c\/td\u003e\n\u003ctd\u003e$2.45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45105270096194,"sku":"RMIROCHR","price":3.35,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286163915123,"sku":"RMIROCHR-5","price":16.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286163947891,"sku":"RMIROCHR-10","price":31.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286163980659,"sku":"RMIROCHR-25","price":75.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286164013427,"sku":"RMIROCHR-50","price":133.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/ironchromate.jpg?v=1693513875"},{"product_id":"iron-oxide-black-5-pounds-rmirooxib","title":"Iron Oxide, Black","description":"\u003cp\u003e\u003cstrong\u003eA black form of iron oxide for browns, blacks, speckles and dark clay bodies.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA black iron powder. In a glaze it gives the same family of colors as red iron oxide: ambers, browns and blacks. Its grains are a little coarser, which makes it good for speckles and dark slips.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse it like red iron oxide. Start at 2 to 4% in a glaze (2 to 4 grams per 100 grams of dry glaze) and test.\u003c\/li\u003e\n\u003cli\u003eFor speckles, stir it into the glaze or clay without sieving it out.\u003c\/li\u003e\n\u003cli\u003eIt can replace red iron oxide nearly one-for-one by weight, but test first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlack iron oxide, Fe₃O₄. Slightly more iron by weight than Fe₂O₃.\u003c\/li\u003e\n\u003cli\u003eCoarser than red iron oxide. Mill or sieve for even color; leave it coarse for specks.\u003c\/li\u003e\n\u003cli\u003eEnds up as Fe₂O₃ in oxidation and FeO in reduction, so it fires much like red iron oxide.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eIt stains skin, clothes and work surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$1.45\u003c\/td\u003e\n\u003ctd\u003e$1.45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$6.50\u003c\/td\u003e\n\u003ctd\u003e$1.30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$12.00\u003c\/td\u003e\n\u003ctd\u003e$1.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$27.50\u003c\/td\u003e\n\u003ctd\u003e$1.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$38.50\u003c\/td\u003e\n\u003ctd\u003e$0.77\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials. That total sets the price level for every bag. For example, ten 50 lb bags of any materials add up to 500 lb, so each bag gets the 500 lb price. Smaller sizes don't count toward the total.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFull-bag pounds in your order\u003c\/th\u003e\n\u003cth\u003ePrice per 50 lb bag\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnder 500 lb\u003c\/td\u003e\n\u003ctd\u003e$38.50\u003c\/td\u003e\n\u003ctd\u003e$0.77\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 lb and up\u003c\/td\u003e\n\u003ctd\u003e$37.50\u003c\/td\u003e\n\u003ctd\u003e$0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$37.00\u003c\/td\u003e\n\u003ctd\u003e$0.74\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$36.00\u003c\/td\u003e\n\u003ctd\u003e$0.72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$35.50\u003c\/td\u003e\n\u003ctd\u003e$0.71\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286164111731,"sku":"RMIROOXIB-1","price":1.45,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67082813735283,"sku":"RMIROOXIB","price":6.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67082802594163,"sku":"RMIROOXIB","price":12.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67082820026739,"sku":"RMIROOXIB","price":27.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":63965746200947,"sku":"RMIROOXIB50","price":38.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/31t5PPp3mrL._AC_UF1000_1000_QL80_0d51f2e7-5c03-4541-9b3f-967237a03a26.jpg?v=1791876104"},{"product_id":"iron-oxide-yellow-five-pound-bag-rmirooxiy5060","title":"Iron Oxide, Yellow","description":"\u003cp\u003e\u003cstrong\u003eA very fine iron oxide for smooth slips and washes. It won't stay yellow in the kiln.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA fine yellow powder. Many people expect a yellow glaze from it, but in the kiln it turns into red iron oxide and gives the same ambers and browns. Potters choose it for its fine grain, which mixes smoothly into slips, washes and engobes. It's also used as a pigment in unfired work like paints and plasters.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDon't use it to make a yellow glaze. For yellow, use a yellow glaze stain.\u003c\/li\u003e\n\u003cli\u003eUse it wherever you'd use red iron oxide, adding about 10% more to get the same amount of iron.\u003c\/li\u003e\n\u003cli\u003eFire a test tile before you use it on finished work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydrated iron oxide, FeO(OH). Loses about 10% of its weight as water in firing and converts to Fe₂O₃.\u003c\/li\u003e\n\u003cli\u003e1 part Fe₂O₃ ≈ 1.1 parts yellow iron oxide.\u003c\/li\u003e\n\u003cli\u003eVery fine particles: disperses easily with little specking.\u003c\/li\u003e\n\u003cli\u003eGrade: #5060.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eIt stains skin, clothes and work surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$6.15\u003c\/td\u003e\n\u003ctd\u003e$6.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$28.50\u003c\/td\u003e\n\u003ctd\u003e$5.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$54.50\u003c\/td\u003e\n\u003ctd\u003e$5.45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$130.00\u003c\/td\u003e\n\u003ctd\u003e$5.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$236.00\u003c\/td\u003e\n\u003ctd\u003e$4.72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286164177267,"sku":"RMIROOXIY5060-1","price":6.15,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45105270554946,"sku":"RMIROOXIY5060","price":28.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286164210035,"sku":"RMIROOXIY5060-10","price":54.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286164242803,"sku":"RMIROOXIY5060-25","price":130.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286164275571,"sku":"RMIROOXIY5060-50","price":236.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/lead-oxide-yellow-500x500.jpg?v=1693514112"},{"product_id":"manganese-carbonate-rmmancar","title":"Manganese Carbonate","description":"\u003cp\u003e\u003cstrong\u003eFor browns, plum purples and metallic bronze effects in glazes, and for darker clay bodies.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA pale pink powder. Manganese gives browns and plum purples in glazes, and at high amounts metallic bronze or black surfaces. It also darkens and speckles clay bodies. The carbonate is the fine-grained form, so it mixes in more evenly than manganese dioxide.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 2 to 4% (2 to 4 grams per 100 grams of dry glaze). Most glazes use 6% or less.\u003c\/li\u003e\n\u003cli\u003eGlazes high in sodium or potassium push it toward purple; most others give browns.\u003c\/li\u003e\n\u003cli\u003eMetallic glazes use much more manganese and need extra care. Read the safety notes first.\u003c\/li\u003e\n\u003cli\u003eAlways fire with kiln ventilation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManganese carbonate, MnCO₃. Loses about 38% of its weight as gas in firing.\u003c\/li\u003e\n\u003cli\u003e1 part MnO₂ ≈ 1.3 parts MnCO₃ for the same manganese.\u003c\/li\u003e\n\u003cli\u003eFiner than manganese dioxide, so fewer specks. The gas it gives off can cause blistering at higher amounts.\u003c\/li\u003e\n\u003cli\u003eWith iron: browns. With iron and cobalt: blacks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManganese gives off fumes during firing.\u003c\/strong\u003e Repeated breathing of manganese fumes or dust can damage the nervous system. Vent your kiln to the outside and stay out of the kiln room while it fires.\u003c\/li\u003e\n\u003cli\u003eWear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eAvoid high-manganese glazes on food surfaces, and have functional ware lab-tested before you sell it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$42.20\u003c\/td\u003e\n\u003ctd\u003e$42.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$194.75\u003c\/td\u003e\n\u003ctd\u003e$38.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$373.50\u003c\/td\u003e\n\u003ctd\u003e$37.35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$892.50\u003c\/td\u003e\n\u003ctd\u003e$35.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$1,784.50\u003c\/td\u003e\n\u003ctd\u003e$32.45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45105272815938,"sku":"RMMANCAR","price":42.2,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286164636019,"sku":"RMMANCAR-5","price":194.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286164668787,"sku":"RMMANCAR-10","price":373.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286164701555,"sku":"RMMANCAR-25","price":892.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286164734323,"sku":"RMMANCAR-55","price":1784.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/1200px-Manganese_28II_29-carbonate-sample_9f72cc3e-8d78-4446-94a1-a38c0d1c4435.jpg?v=1791876107"},{"product_id":"pearl-ash-potassium-carbonate-10-pounds-rmpotcar","title":"Pearl Ash (Potassium Carbonate)","description":"\u003ch2 data-end=\"642\" data-start=\"612\"\u003e\u003cstrong data-end=\"640\" data-start=\"612\"\u003eKey Features \u0026amp; Benefits:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-end=\"1326\" data-start=\"643\"\u003e\n\u003cli data-end=\"754\" data-start=\"643\"\u003e\n\u003cp data-end=\"754\" data-start=\"645\"\u003eHigh-purity \u003cstrong data-end=\"688\" data-start=\"657\"\u003epotassium carbonate (K₂CO₃)\u003c\/strong\u003e, also known as pearl ash. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"925\" data-start=\"755\"\u003e\n\u003cp data-end=\"925\" data-start=\"757\"\u003eActs as a solid \u003cstrong data-end=\"788\" data-start=\"773\"\u003epotash flux\u003c\/strong\u003e source: when used in glazes or ceramic bodies, provides K₂O without introducing unwanted oxides. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1096\" data-start=\"926\"\u003e\n\u003cp data-end=\"1096\" data-start=\"928\"\u003eWhite, hygroscopic solid, highly soluble in water (≈ 110 g per 100 mL at 20 °C) making it efficient for dissolving \u0026amp; dispersing. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1208\" data-start=\"1097\"\u003e\n\u003cp data-end=\"1208\" data-start=\"1099\"\u003eLarge format \u003cstrong data-end=\"1133\" data-start=\"1112\"\u003e50 lb (≈ 22.7 kg)\u003c\/strong\u003e bag offers economies of scale for studios, manufacturing, or bulk users.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1326\" data-start=\"1209\"\u003e\n\u003cp data-end=\"1326\" data-start=\"1211\"\u003eVersatile industrial\/creative uses: ceramics, glass, glazing, chemical intermediates, and speciality manufacturing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1355\" data-start=\"1328\"\u003e\u003cstrong data-end=\"1353\" data-start=\"1328\"\u003eTypical Applications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-end=\"2045\" data-start=\"1356\"\u003e\n\u003cli data-end=\"1562\" data-start=\"1356\"\u003e\n\u003cp data-end=\"1562\" data-start=\"1358\"\u003e\u003cstrong data-end=\"1380\" data-start=\"1358\"\u003eCeramics \u0026amp; Glazing\u003c\/strong\u003e: Use in mid-to-high temperature glazes as a potash flux; yields distinctive colour effects (e.g., copper + high potash = green-yellow tones). \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1702\" data-start=\"1563\"\u003e\n\u003cp data-end=\"1702\" data-start=\"1565\"\u003e\u003cstrong data-end=\"1595\" data-start=\"1565\"\u003eGlass \u0026amp; Frit Manufacturing\u003c\/strong\u003e: A direct source of K₂O, useful when other oxides must be avoided. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" alt=\"https:\/\/digitalfire.com\/material\/pearl%2Bash?utm_source=chatgpt.com\" rel=\"noopener\" href=\"https:\/\/digitalfire.com\/material\/pearl%2Bash?utm_source=chatgpt.com\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between overflow-hidden\"\u003e\u003cspan class=\"max-w-[15ch] grow truncate overflow-hidden text-center\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1829\" data-start=\"1703\"\u003e\n\u003cp data-end=\"1829\" data-start=\"1705\"\u003e\u003cstrong data-end=\"1727\" data-start=\"1705\"\u003eChemical Feedstock\u003c\/strong\u003e: Employed where a highly alkaline potassium salt is required. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003ca class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" alt=\"https:\/\/en.wikipedia.org\/wiki\/Potassium_carbonate?utm_source=chatgpt.com\" rel=\"noopener\" href=\"https:\/\/en.wikipedia.org\/wiki\/Potassium_carbonate?utm_source=chatgpt.com\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2045\" data-start=\"1830\"\u003e\n\u003cp data-end=\"2045\" data-start=\"1832\"\u003e\u003cstrong data-end=\"1871\" data-start=\"1832\"\u003eTraditional Food\/Leavening Contexts\u003c\/strong\u003e: Historically used as a leavening agent (pear-ash in baked goods) though this product is intended for industrial\/technical use-cases. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2079\" data-start=\"2047\"\u003e\u003cstrong data-end=\"2077\" data-start=\"2047\"\u003eTechnical \u0026amp; Handling Info:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-end=\"2680\" data-start=\"2080\"\u003e\n\u003cli data-end=\"2146\" data-start=\"2080\"\u003e\n\u003cp data-end=\"2146\" data-start=\"2082\"\u003eChemical Formula: K₂CO₃. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2237\" data-start=\"2147\"\u003e\n\u003cp data-end=\"2237\" data-start=\"2149\"\u003eAppearance: White crystalline\/hygroscopic solid.\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2402\" data-start=\"2238\"\u003e\n\u003cp data-end=\"2402\" data-start=\"2240\"\u003eStorage: Keep tightly sealed, dry environment — material absorbs moisture from air (hygroscopic) which may cause clumping. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2559\" data-start=\"2403\"\u003e\n\u003cp data-end=\"2559\" data-start=\"2405\"\u003eSafety: Handle with appropriate PPE (gloves, eye protection). Due to its alkaline nature, avoid skin\/eye contact and store away from incompatible acids.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2680\" data-start=\"2560\"\u003e\n\u003cp data-end=\"2680\" data-start=\"2562\"\u003ePackaging: Supplied in a robust bulk-bag appropriate for 50 lb weight; ideal for studio backstock or batch production.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"3022\" data-start=\"2682\"\u003e\u003cstrong data-end=\"2710\" data-start=\"2682\"\u003eWhy Choose This Product?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-end=\"3022\" data-start=\"2682\"\u003eFor the serious ceramicist, glass-fabricator or chemical-processing professional: this bulk format provides a cost-effective way to access high purity potash flux\/alkali in the scale you need. No compromise in quality, and excellent flexibility for custom formulae, glaze recipes or industrial chemical needs.\u003c\/p\u003e\n\u003cp data-end=\"3093\" data-start=\"3024\"\u003e\u003cstrong data-end=\"3091\" data-start=\"3024\"\u003eUse \u0026amp; Application Tips (Staff-College style “Order of Battle”):\u003c\/strong\u003e\u003c\/p\u003e\n\u003col data-end=\"3960\" data-start=\"3094\"\u003e\n\u003cli data-end=\"3224\" data-start=\"3094\"\u003e\n\u003cp data-end=\"3224\" data-start=\"3097\"\u003e\u003cstrong data-end=\"3120\" data-start=\"3097\"\u003eRecon \u0026amp; Preparation\u003c\/strong\u003e: Confirm your substrate (glaze base, clay body or chemical mix) tolerates a highly alkaline addition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3417\" data-start=\"3225\"\u003e\n\u003cp data-end=\"3417\" data-start=\"3228\"\u003e\u003cstrong data-end=\"3242\" data-start=\"3228\"\u003eDeployment\u003c\/strong\u003e: Incorporate powder in your batch with caution — mix dry first, then add water or other liquids as required. Ensure full dissolution if you intend to use the solution form.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3625\" data-start=\"3418\"\u003e\n\u003cp data-end=\"3625\" data-start=\"3421\"\u003e\u003cstrong data-end=\"3435\" data-start=\"3421\"\u003eMonitoring\u003c\/strong\u003e: Because K₂CO₃ is very soluble and active, monitor your colour response, melt behaviour and compatibility. For glaze use: a potash-rich glaze will melt differently than a sodium-rich one.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3818\" data-start=\"3626\"\u003e\n\u003cp data-end=\"3818\" data-start=\"3629\"\u003e\u003cstrong data-end=\"3657\" data-start=\"3629\"\u003eAfter-Action Maintenance\u003c\/strong\u003e: Store remaining material in a sealed container in a low-humidity environment; label clearly for “technical use – not food grade” unless documented otherwise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3960\" data-start=\"3819\"\u003e\n\u003cp data-end=\"3960\" data-start=\"3822\"\u003e\u003cstrong data-end=\"3837\" data-start=\"3822\"\u003eContingency\u003c\/strong\u003e: Always keep a small sample for reference. When scaling up, use consistent testing to ensure batch-to-batch repeatability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286211789171,"sku":"RMPOTCAR-1","price":3.25,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286211821939,"sku":"RMPOTCAR-5","price":15.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286211854707,"sku":"RMPOTCAR-10","price":30.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286211887475,"sku":"RMPOTCAR-25","price":72.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":45105277763906,"sku":"RMPOTCAR","price":130.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/potassiumcarb__23290.1585688843.jpg?v=1693515476"},{"product_id":"potassium-nitrate-5-pounds-rmpotnit","title":"Potassium Nitrate","description":"\u003cp\u003e\u003cspan\u003e\u003c\/span\u003ePotassium Nitrate \u003cbr\u003e\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286212084083,"sku":"RMPOTNIT-1","price":3.65,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45105278779714,"sku":"RMPOTNIT","price":17.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286212116851,"sku":"RMPOTNIT-10","price":34.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286212149619,"sku":"RMPOTNIT-25","price":82.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286212182387,"sku":"RMPOTNIT-55","price":165.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/5pn_1635_L_99c5908d-fd06-4768-b7f8-8d0c3374f64a.jpg?v=1791876105"},{"product_id":"rutile-granular-one-pound-rmrutgra","title":"Rutile, Granular","description":"\u003cp\u003e\u003cstrong\u003eCoarse rutile grains for speckles and flecks of color in glazes and clay.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eRutile is a natural mineral: titanium dioxide with some iron. Ground to a powder, it's famous for streaky, variegated \"rutile\" glazes. This granular grade is coarse, so instead of blending in, the grains leave small dark speckles and bursts of color.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 0.5 to 1% (half a gram to 1 gram per 100 grams of dry glaze) and test.\u003c\/li\u003e\n\u003cli\u003eStir it in after you sieve the glaze, or the sieve will catch the grains.\u003c\/li\u003e\n\u003cli\u003eA small amount in a clay body gives a speckled stoneware look.\u003c\/li\u003e\n\u003cli\u003eWant the smooth, streaky rutile look instead? That comes from powdered rutile, not granular.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNatural rutile, mostly TiO₂ with iron. Because it's mined, its iron and titanium content varies from lot to lot.\u003c\/li\u003e\n\u003cli\u003eThe grains partly melt and bleed color around each speck; hotter firings and more fluid glazes bleed more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$13.55\u003c\/td\u003e\n\u003ctd\u003e$13.55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$62.50\u003c\/td\u003e\n\u003ctd\u003e$12.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$120.00\u003c\/td\u003e\n\u003ctd\u003e$12.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$287.50\u003c\/td\u003e\n\u003ctd\u003e$11.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 lb bag\u003c\/td\u003e\n\u003ctd\u003e$1,040.00\u003c\/td\u003e\n\u003ctd\u003e$10.40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45105281302850,"sku":"RMRUTGRA","price":13.55,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286164832627,"sku":"RMRUTGRA-5","price":62.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286164865395,"sku":"RMRUTGRA-10","price":120.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286164898163,"sku":"RMRUTGRA-25","price":287.5,"currency_code":"USD","in_stock":true},{"title":"100 Pounds","offer_id":67286164930931,"sku":"RMRUTGRA-100","price":1040.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Granular-Rutile-e1737983700843_ef5cb673-e6ab-45a8-b5df-8e847a2d8011.jpg?v=1791876105"},{"product_id":"titanium-dioxide-1-pound-rmtitdio","title":"Titanium Dioxide","description":"\u003cp\u003e\u003cstrong\u003ePure titanium for soft, creamy whites, satin surfaces and variegated, crystal-flecked glazes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA bright white powder. In a glaze it gives soft, semi-opaque whites and creams, and it can grow tiny crystals as the glaze cools, giving a variegated, satin look. It's the pure form of the titanium found in rutile, without rutile's iron.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor a soft white or semi-opaque look, start at about 5% (5 grams per 100 grams of dry glaze).\u003c\/li\u003e\n\u003cli\u003eAround 8 to 10%, glazes tend to go satin or matte.\u003c\/li\u003e\n\u003cli\u003eWith iron it gives creams and warm yellows.\u003c\/li\u003e\n\u003cli\u003eFor a bright, solid white, tin oxide or a zircon opacifier like Ultrox works better. Titanium whites are creamier.\u003c\/li\u003e\n\u003cli\u003eIt's not a one-for-one swap for rutile. Rutile carries iron and gives more color and movement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTitanium dioxide, TiO₂.\u003c\/li\u003e\n\u003cli\u003ePromotes crystal growth and variegation on cooling, especially in fluid glazes and slow cools.\u003c\/li\u003e\n\u003cli\u003eIn boron-rich glazes it can produce bluish, milky streaks.\u003c\/li\u003e\n\u003cli\u003eOpacifies less strongly per gram than tin or zircon, and warms whites toward cream.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$6.85\u003c\/td\u003e\n\u003ctd\u003e$6.85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$33.50\u003c\/td\u003e\n\u003ctd\u003e$6.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$66.00\u003c\/td\u003e\n\u003ctd\u003e$6.60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$162.50\u003c\/td\u003e\n\u003ctd\u003e$6.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$341.00\u003c\/td\u003e\n\u003ctd\u003e$6.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials. That total sets the price level for every bag. For example, ten 50 lb bags of any materials add up to 500 lb, so each bag gets the 500 lb price. Smaller sizes don't count toward the total.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFull-bag pounds in your order\u003c\/th\u003e\n\u003cth\u003ePrice per 55 lb bag\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnder 500 lb\u003c\/td\u003e\n\u003ctd\u003e$341.00\u003c\/td\u003e\n\u003ctd\u003e$6.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 lb and up\u003c\/td\u003e\n\u003ctd\u003e$334.50\u003c\/td\u003e\n\u003ctd\u003e$6.08\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$327.50\u003c\/td\u003e\n\u003ctd\u003e$5.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$321.00\u003c\/td\u003e\n\u003ctd\u003e$5.84\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$314.00\u003c\/td\u003e\n\u003ctd\u003e$5.71\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45105285464386,"sku":"RMTITDIO","price":6.85,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286165389683,"sku":"RMTITDIO-5","price":33.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286165422451,"sku":"RMTITDIO-10","price":66.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286165455219,"sku":"RMTITDIO-25","price":162.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286165487987,"sku":"RMTITDIO50","price":341.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/81tuYvro6kL_83d9ec0b-eb37-4ae7-b4e3-fcf6ea163b29.jpg?v=1791876106"},{"product_id":"barium-carbonate-5-pounds-rmbarcar","title":"Barium Carbonate","description":"\u003cspan\u003e\u003c\/span\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eBARIUM CARBONATE\u003c\/h2\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eBarium Carbonate—Type FF\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eDESCRIPTION\u003cbr\u003eBarium Carbonate: (BaCO3)\u003cbr\u003eAppearance: White powder\u003c\/p\u003e\n\u003cp\u003eBarium Carbonate BaCO3, is a major raw material in the manufacture of porcelain enamel frits, glazes, ferrite magnets, barium titanate, barium sulfate, miscellaneous barium chemicals and various types of glass including television picture tubes, reflective glass beads and other specialty scientific, optical and art glasses.\u003c\/p\u003e\n\u003cp\u003eIt is also used for the precipitation and removal of sulfates in various chemical processes and for the prevention of scum in the manufacture of face brick.\u003c\/p\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eCHEMICAL PROPERTIES\u003c\/h2\u003e\n\u003cb\u003eProperty Specification Limits\u003c\/b\u003e\u003cbr\u003eBaCO3 + SrCO3 , % 99 min.\u003cbr\u003eSrCO3H, % 2.5 max.\u003cbr\u003eIron as Fe, ppm 40 max.\u003cbr\u003eSulfur as S , % 0.1 max.\u003cbr\u003eNa2CO3,% 0.9 max.\u003cbr\u003e+325 mesh US\/TY mesh, % 1.0 max.\u003cbr\u003eMoisture , % 0.25 max.","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286206939507,"sku":"RMBARCAR-1","price":6.3,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45113693143362,"sku":"RMBARCAR","price":29.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286206972275,"sku":"RMBARCAR-10","price":57.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286207005043,"sku":"RMBARCAR-25","price":140.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286207037811,"sku":"RMBARCAR50","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Untitleddesign_0a7ec555-d0ad-46fa-baaa-e77ab507f255.jpg?v=1696607227"},{"product_id":"chrome-oxide-five-pounds-rmchroxi","title":"Chrome Oxide","description":"\u003cp\u003e\u003cstrong\u003eA strong, opaque green for glazes. Small amounts go a long way, and it reacts with other ingredients in surprising ways.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA dark green powder that gives glazes a solid, opaque green. It doesn't melt into the glaze easily, so too much makes the surface dry and dull. It's also known for changing color around other ingredients: next to tin it turns pink, and with zinc it turns brown.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 0.5% in a clear or white base glaze: half a gram per 100 grams of dry glaze. Most glazes use 2% or less.\u003c\/li\u003e\n\u003cli\u003eUse a base glaze without zinc if you want green. Zinc turns chrome brown.\u003c\/li\u003e\n\u003cli\u003eWatch your kiln load: chrome can vaporize and turn nearby glazes that contain tin oxide pink.\u003c\/li\u003e\n\u003cli\u003eFire a test tile before you glaze a whole batch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eChromium(III) oxide, Cr₂O₃. Very refractory.\u003c\/li\u003e\n\u003cli\u003eColor depends on the base: calcium, potassium, sodium, barium and magnesium fluxes all shift it.\u003c\/li\u003e\n\u003cli\u003eWith tin oxide: chrome-tin pinks and reds (the basis of chrome-tin pink stains). With zinc: browns. With cobalt: teals and blue-greens.\u003c\/li\u003e\n\u003cli\u003eUsed with iron, cobalt and manganese in black glazes and stains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDon't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eKeep it away from food areas, children and pets. For functional ware, use a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$18.80\u003c\/td\u003e\n\u003ctd\u003e$18.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$89.50\u003c\/td\u003e\n\u003ctd\u003e$17.90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$170.50\u003c\/td\u003e\n\u003ctd\u003e$17.05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$405.00\u003c\/td\u003e\n\u003ctd\u003e$16.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$738.50\u003c\/td\u003e\n\u003ctd\u003e$13.43\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52679570981235,"sku":"RMCHROXI","price":18.8,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52679570260339,"sku":"RMCHROXI","price":89.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52679570293107,"sku":"RMCHROXI","price":170.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52679570325875,"sku":"RMCHROXI","price":405.0,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":52679570358643,"sku":"RMCHROXI","price":738.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/chromo_e60777ec-e08a-44a5-9599-c6f29341499c.png?v=1791876655"},{"product_id":"cobalt-carbonate-half-pound-rmcobcarhp","title":"Cobalt Carbonate","description":"\u003cp\u003e\u003cstrong\u003eThe classic pottery blue. Very strong, so a tiny amount goes a long way.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA pinkish-purple powder that fires blue. It's one of the strongest colorants in pottery: half a percent gives a clear medium blue. It's finer than cobalt oxide, so it mixes in evenly with fewer specks.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 0.5% in a clear or white base glaze: half a gram per 100 grams of dry glaze. Use a scale that reads to 0.1 gram.\u003c\/li\u003e\n\u003cli\u003eAbout 0.25% gives light blue, 0.5 to 1% medium blue, and 2% or more dark navy.\u003c\/li\u003e\n\u003cli\u003eSmall amounts also deepen blacks and other dark colors.\u003c\/li\u003e\n\u003cli\u003eIf your recipe uses cobalt oxide, use about 1.5 grams of carbonate for every 1 gram of oxide.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCobalt carbonate, CoCO₃. Weaker by weight than cobalt oxide, because part of it leaves as gas during firing.\u003c\/li\u003e\n\u003cli\u003e1 part cobalt oxide ≈ 1.5 parts cobalt carbonate.\u003c\/li\u003e\n\u003cli\u003eBase matters: magnesium-rich bases push it toward purple; alkaline and zinc bases give bright blues; iron, manganese or rutile soften it toward gray-blue, teal or black; chrome turns it teal.\u003c\/li\u003e\n\u003cli\u003eActs as a flux at higher amounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCobalt compounds may cause cancer if inhaled and can cause skin allergies. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eFor mugs, bowls and plates, keep cobalt low in a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e½ lb\u003c\/td\u003e\n\u003ctd\u003e$38.50\u003c\/td\u003e\n\u003ctd\u003e$77.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$64.30\u003c\/td\u003e\n\u003ctd\u003e$64.30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$306.00\u003c\/td\u003e\n\u003ctd\u003e$61.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$581.50\u003c\/td\u003e\n\u003ctd\u003e$58.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$1,377.50\u003c\/td\u003e\n\u003ctd\u003e$55.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$2,524.50\u003c\/td\u003e\n\u003ctd\u003e$45.90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"Half Pound","offer_id":52679498924403,"sku":"RMCOBCARHP","price":38.5,"currency_code":"USD","in_stock":true},{"title":"1 Pound","offer_id":52679498957171,"sku":"RMCOBCARP","price":64.3,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52679498989939,"sku":"RMCOBCAR5P","price":306.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52679499022707,"sku":"RMCOBCAR10P","price":581.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52679499055475,"sku":"RMCOBCAR25P","price":1377.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":52679499088243,"sku":"RMCOBCAR55P","price":2524.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Untitleddesign_8_063bd5f7-a8fa-4a31-a5e3-4a3b73d50bf3.jpg?v=1696622877"},{"product_id":"cobalt-oxide-fifty-five-pounds-rmcoboxi","title":"Cobalt Oxide","description":"\u003cp\u003e\u003cstrong\u003eThe strongest blue in pottery. Use tiny amounts for deep blues, blacks and blue speckles.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA black powder that fires a strong blue. It's about one and a half times as strong as cobalt carbonate. The grains are coarser, so it can leave blue specks unless it's mixed very well.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 0.25 to 0.5% in a clear or white base glaze: a quarter to half a gram per 100 grams of dry glaze. Use a scale that reads to 0.1 gram.\u003c\/li\u003e\n\u003cli\u003eAbout 1% gives deep blue; 2% and up nears navy or blue-black.\u003c\/li\u003e\n\u003cli\u003eSieve the wet glaze through an 80-mesh screen, twice if you see specks.\u003c\/li\u003e\n\u003cli\u003eIf your recipe uses cobalt carbonate, use about 0.67 grams of oxide for every 1 gram of carbonate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlack cobalt oxide, Co₃O₄. Releases little gas in firing.\u003c\/li\u003e\n\u003cli\u003e1 part cobalt oxide ≈ 1.5 parts cobalt carbonate.\u003c\/li\u003e\n\u003cli\u003eCoarser than the carbonate. Ball-mill or sieve thoroughly for even color, or leave it coarse on purpose for speckles.\u003c\/li\u003e\n\u003cli\u003eSame base effects as cobalt carbonate: purples in magnesium bases, bright blues in alkaline and zinc bases, teal with chrome.\u003c\/li\u003e\n\u003cli\u003eA key ingredient, with iron, manganese and chrome, in black glazes and stains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCobalt compounds may cause cancer if inhaled and can cause skin allergies. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eFor mugs, bowls and plates, keep cobalt low in a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e½ lb\u003c\/td\u003e\n\u003ctd\u003e$46.40\u003c\/td\u003e\n\u003ctd\u003e$92.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$77.50\u003c\/td\u003e\n\u003ctd\u003e$77.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$369.00\u003c\/td\u003e\n\u003ctd\u003e$73.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$701.50\u003c\/td\u003e\n\u003ctd\u003e$70.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$1,662.50\u003c\/td\u003e\n\u003ctd\u003e$66.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$3,044.50\u003c\/td\u003e\n\u003ctd\u003e$55.35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1\/2 Pound","offer_id":52682143924595,"sku":"RMCOBOXI","price":46.4,"currency_code":"USD","in_stock":true},{"title":"1 Pound","offer_id":52682143957363,"sku":"RMCOBOXI","price":77.5,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52682143990131,"sku":"RMCOBOXI-3","price":369.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52682144022899,"sku":"RMCOBOXI","price":701.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52682144055667,"sku":"RMCOBOXI","price":1662.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":52682144088435,"sku":"RMCOBOXI","price":3044.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/oxyde-de-cobalt-132-49018680_39c43be0-6069-4f87-a597-31c378e0d0f3.jpg?v=1791876655"},{"product_id":"copper-carbonate-50-pounds-rmcopcar","title":"Copper Carbonate","description":"\u003cp\u003e\u003cstrong\u003eGives you greens in an electric kiln and copper reds in a gas kiln. One of the most popular glaze colorants.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA light green powder you mix into a glaze to give it color. In an electric kiln it makes greens, from pale to deep forest green. In a gas kiln fired \"in reduction\" (with less oxygen), a small amount can turn a glaze copper red.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdd it to a clear or white base glaze. 2% is a good start: 2 grams of copper carbonate for every 100 grams of dry glaze.\u003c\/li\u003e\n\u003cli\u003e1 to 2% gives light green, 3 to 5% medium to deep green. Above about 5% it can turn metallic or black and make the glaze run.\u003c\/li\u003e\n\u003cli\u003eAfter mixing, pour the wet glaze through an 80-mesh sieve so the color comes out even, not streaky.\u003c\/li\u003e\n\u003cli\u003eFire a test tile before you glaze a whole batch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBasic copper carbonate, CuCO₃·Cu(OH)₂. About 72% CuO by weight; LOI about 28%.\u003c\/li\u003e\n\u003cli\u003eTo swap for black copper oxide: 1 part CuO ≈ 1.4 parts copper carbonate.\u003c\/li\u003e\n\u003cli\u003eFiner than copper oxide, so less specking. The gas it releases while firing can add to pinholing in thick coats.\u003c\/li\u003e\n\u003cli\u003eHigh-alkali and barium bases push copper toward turquoise and blue; calcium and boron bases give greens.\u003c\/li\u003e\n\u003cli\u003eCopper reds: usually 0.3 to 0.5% with about 1% tin oxide, fired in reduction. At high temperatures copper can vaporize and stain nearby pots and shelves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHarmful if swallowed; don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when weighing it dry. Wear gloves, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eCopper can leach out of glazes on food surfaces, especially glossy, high-copper or under-fired glazes. For mugs, bowls and plates, use a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$9.75\u003c\/td\u003e\n\u003ctd\u003e$9.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$46.50\u003c\/td\u003e\n\u003ctd\u003e$9.30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$88.00\u003c\/td\u003e\n\u003ctd\u003e$8.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$208.75\u003c\/td\u003e\n\u003ctd\u003e$8.35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$347.50\u003c\/td\u003e\n\u003ctd\u003e$6.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52679393247603,"sku":"RMCOPCAR","price":9.75,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52679393280371,"sku":"RMCOPCAR","price":46.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52679393313139,"sku":"RMCOPCAR","price":88.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52679393345907,"sku":"RMCOPCAR","price":208.75,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":52679393378675,"sku":"RMCOPCAR","price":347.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/copper-corbonate_c06bd4d0-613c-49ef-a75a-b3ecc3f4efae.png?v=1791876656"},{"product_id":"copper-oxide-black-1-pound-rmcopoxib","title":"Copper Oxide Black","description":"\u003cp\u003e\u003cstrong\u003eThe stronger form of copper. Greens in an electric kiln, copper reds in reduction, and speckles when you want them.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA black powder that colors glazes green in an electric kiln. In a gas kiln fired in reduction (with less oxygen) it can give copper reds. It's stronger than copper carbonate, so you need less. Its larger grains can leave small dark specks, which some potters like.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdd it to a clear or white base glaze. Start at 1% (1 gram per 100 grams of dry glaze) and test up to about 4%.\u003c\/li\u003e\n\u003cli\u003eAbove about 5% it can turn metallic or black and make the glaze run.\u003c\/li\u003e\n\u003cli\u003eFor even color, sieve the wet glaze through an 80-mesh screen. For speckles, stir it in after sieving.\u003c\/li\u003e\n\u003cli\u003eIf your recipe uses copper carbonate, use about 0.7 grams of copper oxide for every 1 gram of carbonate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCupric oxide, CuO. Releases no gas in firing.\u003c\/li\u003e\n\u003cli\u003e1 part CuO ≈ 1.4 parts copper carbonate.\u003c\/li\u003e\n\u003cli\u003eA strong flux: it lowers the melting point and can make glazes run.\u003c\/li\u003e\n\u003cli\u003eBase matters: sodium bases give turquoise, potassium bases yellow-greens, barium bases blue-greens.\u003c\/li\u003e\n\u003cli\u003eCoarser than copper carbonate. Ball-mill or sieve it for even color.\u003c\/li\u003e\n\u003cli\u003eAt high temperatures copper can vaporize and stain nearby pots and shelves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHarmful if swallowed; don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when weighing it dry. Wear gloves, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eCopper can leach out of glazes on food surfaces, especially glossy, high-copper or under-fired glazes. For mugs, bowls and plates, use a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$26.05\u003c\/td\u003e\n\u003ctd\u003e$26.05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$124.00\u003c\/td\u003e\n\u003ctd\u003e$24.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$236.00\u003c\/td\u003e\n\u003ctd\u003e$23.60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$560.00\u003c\/td\u003e\n\u003ctd\u003e$22.40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$930.00\u003c\/td\u003e\n\u003ctd\u003e$18.60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52682113909107,"sku":"RMCOPOXIB","price":26.05,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52682113941875,"sku":"RMCOPOXIB","price":124.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52682113974643,"sku":"RMCOPOXIB","price":236.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52682114007411,"sku":"RMCOPOXIB","price":560.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":52682114040179,"sku":"RMCOPOXIB","price":930.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/B-C_8f483369-c92a-4710-aa87-c00ac3d0f6bf.png?v=1791876656"},{"product_id":"copper-oxide-red-fifty-pound-bag-rmcopoxir","title":"Copper Oxide Red","description":"\u003cp\u003e\u003cstrong\u003eThe red form of copper oxide, used mainly in copper red and raku glazes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA reddish-brown copper powder. Potters use it mostly for copper red glazes fired in a gas kiln in reduction (with less oxygen), and for raku effects. In an electric kiln it changes during firing and gives greens, like any other copper.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCopper red recipes use very little copper, often half a percent or less. Follow your recipe closely.\u003c\/li\u003e\n\u003cli\u003eCopper reds need a reduction firing. In an electric kiln you'll get green.\u003c\/li\u003e\n\u003cli\u003eDon't swap it one-for-one with black copper oxide or copper carbonate. The amounts differ (see below).\u003c\/li\u003e\n\u003cli\u003eFire test tiles first: copper reds are sensitive to glaze thickness and the firing schedule.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCuprous oxide, Cu₂O. Carries more copper per gram than the other forms.\u003c\/li\u003e\n\u003cli\u003e1 part Cu₂O supplies about the same copper as 1.1 parts CuO, or 1.55 parts copper carbonate.\u003c\/li\u003e\n\u003cli\u003eConverts to CuO in oxidation firings, so it behaves like black copper oxide in an electric kiln.\u003c\/li\u003e\n\u003cli\u003eCopper reds commonly pair it with about 1% tin oxide.\u003c\/li\u003e\n\u003cli\u003eAt high temperatures copper can vaporize and stain nearby pots and shelves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHarmful if swallowed; don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when weighing it dry. Wear gloves, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eCopper can leach out of glazes on food surfaces. For mugs, bowls and plates, use a stable, tested base glaze, and have the finished glaze lab-tested before you sell the work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$33.75\u003c\/td\u003e\n\u003ctd\u003e$33.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$160.75\u003c\/td\u003e\n\u003ctd\u003e$32.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$305.50\u003c\/td\u003e\n\u003ctd\u003e$30.55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$725.00\u003c\/td\u003e\n\u003ctd\u003e$29.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$1,204.50\u003c\/td\u003e\n\u003ctd\u003e$24.09\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52682121347443,"sku":"RMCOPOXIR","price":33.75,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52682121380211,"sku":"RMCOPOXIR","price":160.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52682121412979,"sku":"RMCOPOXIR","price":305.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52682121445747,"sku":"RMCOPOXIR","price":725.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":52682121478515,"sku":"RMCOPOXIR","price":1204.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/CP-red_12ea9cbe-cbac-45fd-aae2-c52b85ac8fc7.png?v=1791876657"},{"product_id":"cryolite-rmcryoli","title":"Temporarily Out Of Stock - Cryolite 5 Pounds","description":"\u003cspan\u003e\u003c\/span\u003eCRYOLITE 5 pounds","brand":"Sheffield Pottery","offers":[{"title":"Default Title","offer_id":45113707528514,"sku":"RMCRYOLI","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/large-cryolite_powder.jpg?v=1723661263"},{"product_id":"lithium-carbonate-powdered-rmlitcarp","title":"Lithium Carbonate - Powdered","description":"\u003ch2 class=\"abz-seo-product\"\u003eLithium Carbonate - Powdered \u003c\/h2\u003e\n\u003cp\u003eLithium Carbonate - Powdered  \u003cbr\u003eLITHIUM CARBONATE - Li2CO3 (m.p. 1330o F\/720o C) is the most common form of the alkali Lithium. It is a major flux for higher temperature (Cone 5-13) alkaline glazes. It is less soluble than other alkaline compounds and produces more durable glazes. This lithium carbonate powder can also be used as a supplemental flux to reduce the maturing temperature of stoneware glazes by as much as 2 or 3 cones.\u003c\/p\u003e\n\u003cp\u003eThe powder and granular forms differ in particle size (the latter being coarser) and reactivity. The granular form can be used at higher temperatures where the reduced reactivity can be overcome.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52679494533491,"sku":"RMLITCARP1","price":33.6,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52679493386611,"sku":"RMLITCARP","price":160.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52679493419379,"sku":"RMLITCARP","price":304.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52679493452147,"sku":"RMLITCARP","price":720.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":62405324210547,"sku":null,"price":1200.0,"currency_code":"USD","in_stock":true},{"title":"100 Pounds","offer_id":52679493484915,"sku":"RMLITCARP","price":2400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Untitleddesign_3.jpg?v=1696879626"},{"product_id":"manganese-dioxide-granular-60m-5-pounds-rmmandiog","title":"Manganese Dioxide, Granular 60 Mesh","description":"\u003cp\u003e\u003cspan\u003e\u003c\/span\u003eManganese Dioxide-granular 60M.\u003cbr\u003e\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67294013292915,"sku":"RMMANDIOG-1","price":2.05,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45113732366658,"sku":"RMMANDIOG","price":7.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67294013325683,"sku":"RMMANDIOG-10","price":14.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67294013358451,"sku":"RMMANDIOG-25","price":33.75,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67294013391219,"sku":"RMMANDIOG-50","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/m_15336.5c5c8f8fc07d8.jpg?v=1696880970"},{"product_id":"manganese-dioxide-powdered-5-pounds-rmmandiop","title":"Manganese Dioxide, Powdered","description":"\u003cp\u003e\u003cspan\u003e\u003c\/span\u003eManganese Dioxide-powdered\u003cbr\u003e\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67294013161843,"sku":"RMMANDIOP-1","price":1.85,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45113732661570,"sku":"RMMANDIOP","price":6.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67294013194611,"sku":"RMMANDIOP-10","price":12.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67294013227379,"sku":"RMMANDIOP-25","price":28.75,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67294013260147,"sku":"RMMANDIOP-50","price":56.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Untitleddesign_5_4467335f-4876-4042-bfc5-88ae5e941660.jpg?v=1696881269"},{"product_id":"nickel-carbonate-fifty-pounds-rmniccar","title":"Nickel Carbonate","description":"\u003cp\u003e\u003cstrong\u003eThe fine-grained form of nickel, for even grays, browns and muted colors without specks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA light green powder. It gives the same quiet colors as nickel oxide (grays, tans, browns, olive greens) but its finer grain mixes in more evenly. In high-zinc glazes it can give blues or purples.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 1% (1 gram per 100 grams of dry glaze) and test.\u003c\/li\u003e\n\u003cli\u003eIf your recipe uses nickel oxide, carbonate is weaker by weight. Start with about 1.5 times as much and adjust after testing.\u003c\/li\u003e\n\u003cli\u003eFire test tiles first: nickel colors shift a lot with the base glaze and firing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNickel carbonate (often a basic carbonate). Converts to NiO in firing, losing a large share of its weight as gas.\u003c\/li\u003e\n\u003cli\u003eFiner than either nickel oxide, so better dispersion and fewer specks. The gas it releases can add to pinholing in thick coats.\u003c\/li\u003e\n\u003cli\u003eSame base effects as nickel oxide.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNickel compounds may cause cancer if inhaled and often cause skin allergies. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eAvoid nickel glazes on food surfaces unless the finished glaze has been lab-tested.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping:\u003c\/strong\u003e we can't ship nickel carbonate by UPS or USPS.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$32.80\u003c\/td\u003e\n\u003ctd\u003e$32.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$156.25\u003c\/td\u003e\n\u003ctd\u003e$31.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$297.00\u003c\/td\u003e\n\u003ctd\u003e$29.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$702.50\u003c\/td\u003e\n\u003ctd\u003e$28.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$1,171.00\u003c\/td\u003e\n\u003ctd\u003e$23.42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":62049203913075,"sku":"RMNICCAR-5","price":32.8,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":62049203945843,"sku":"RMNICCAR-1","price":156.25,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":62049203978611,"sku":"RMNICCAR-2","price":297.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":62049204011379,"sku":"RMNICCAR-3","price":702.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":62049204044147,"sku":"RMNICCAR-4","price":1171.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMNICCAR-2_15919aad-0be6-406a-aec0-98c0fb1e32a9.jpg?v=1696881097"},{"product_id":"nickel-oxide-black-fifty-pounds-rmnicoxib","title":"Nickel Oxide Black","description":"\u003cp\u003e\u003cstrong\u003eA colorant for soft grays, browns and muted greens, and for toning down colors that are too bright.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA black powder. On its own, nickel gives quiet, earthy colors: grays, tans, browns and olive greens. Potters often add a little to soften a color. In some glazes, especially ones high in zinc, it can give blues or purples instead, so test carefully.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 0.5 to 1% (half a gram to 1 gram per 100 grams of dry glaze). Most glazes use 3% or less.\u003c\/li\u003e\n\u003cli\u003eMix it in well and sieve the wet glaze through an 80-mesh screen to avoid specks.\u003c\/li\u003e\n\u003cli\u003eNickel colors shift a lot with the base glaze and the firing. Fire test tiles first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlack nickel oxide, a higher oxide of nickel that converts to NiO during firing.\u003c\/li\u003e\n\u003cli\u003eRefractory: higher amounts push glazes toward matte and dry.\u003c\/li\u003e\n\u003cli\u003eBase matters: magnesium bases give greens and tans; high-zinc bases can give blues and purples; with cobalt it gives grays and gray-blues.\u003c\/li\u003e\n\u003cli\u003eA common colorant in crystalline glazes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNickel compounds may cause cancer if inhaled and often cause skin allergies. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eAvoid nickel glazes on food surfaces unless the finished glaze has been lab-tested.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$52.65\u003c\/td\u003e\n\u003ctd\u003e$52.65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$250.50\u003c\/td\u003e\n\u003ctd\u003e$50.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$476.00\u003c\/td\u003e\n\u003ctd\u003e$47.60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$1,127.50\u003c\/td\u003e\n\u003ctd\u003e$45.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$1,879.00\u003c\/td\u003e\n\u003ctd\u003e$37.58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52682157818227,"sku":"RMNICOXIB","price":52.65,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52682157850995,"sku":"RMNICOXIB","price":250.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52682157883763,"sku":"RMNICOXIB","price":476.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52682157916531,"sku":"RMNICOXIB","price":1127.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":52682157949299,"sku":"RMNICOXIB","price":1879.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMNICOXIB-2_ac2ba089-3cc1-4a48-af31-46c8067ba4a3.jpg?v=1696881289"},{"product_id":"nickel-oxide-green-fifty-pounds-rmnicoxig","title":"Nickel Oxide Green","description":"\u003cp\u003e\u003cstrong\u003eThe stable form of nickel oxide, for grays, browns, muted greens and crystalline glazes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA gray-green powder. Despite the name, it doesn't reliably make green glazes. Nickel gives quiet, earthy colors (grays, tans, browns and olive greens) and is often used to soften brighter colors. In high-zinc glazes it can give blues or purples.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStart at 0.5 to 1% (half a gram to 1 gram per 100 grams of dry glaze). Most glazes use 3% or less.\u003c\/li\u003e\n\u003cli\u003eRecipes usually name either green or black nickel oxide. They give similar colors, but test before swapping one for the other.\u003c\/li\u003e\n\u003cli\u003eSieve the wet glaze through an 80-mesh screen to avoid specks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNickel(II) oxide, NiO. This is the form nickel ends up in after firing, so it releases no gas.\u003c\/li\u003e\n\u003cli\u003eRefractory: higher amounts push glazes toward matte and dry.\u003c\/li\u003e\n\u003cli\u003eBase matters: magnesium bases give greens and tans; high-zinc bases can give blues and purples; with cobalt it gives grays and gray-blues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNickel compounds may cause cancer if inhaled and often cause skin allergies. Wear a NIOSH-approved respirator (N95 or better) and gloves when handling it dry. Clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eAvoid nickel glazes on food surfaces unless the finished glaze has been lab-tested.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$50.40\u003c\/td\u003e\n\u003ctd\u003e$50.40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$240.00\u003c\/td\u003e\n\u003ctd\u003e$48.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$456.00\u003c\/td\u003e\n\u003ctd\u003e$45.60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$1,080.00\u003c\/td\u003e\n\u003ctd\u003e$43.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$1,800.00\u003c\/td\u003e\n\u003ctd\u003e$36.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52682156409203,"sku":"RMNICOXIG","price":50.4,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52682156441971,"sku":"RMNICOXIG","price":240.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52682156474739,"sku":"RMNICOXIG","price":456.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52682156507507,"sku":"RMNICOXIG","price":1080.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":52682156540275,"sku":"RMNICOXIG","price":1800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMNICOXIG50-2_8eabcd80-3f3c-4a15-9c54-5bc3163e4d9a.jpg?v=1696881453"},{"product_id":"dark-milled-rutile-rmrutdar","title":"Rutile, Dark Milled","description":"\u003cspan\u003e\u003c\/span\u003eRUTILE, DARK MILLED \u003cbr\u003eThe raw version of rutile:\u003cbr\u003eYou probably want the Ceramic grade Light calcined rutile if you are making glazes:\u003cbr\u003eOne pound: \u003ca href=\"https:\/\/sheffield-pottery.myshopify.com\/products\/light-ceramic-grade-calcined-rutile-rmrutlig\"\u003e https:\/\/www.sheffield-pottery.com\/Light-Ceramic-Gr...\u003c\/a\u003e\u003cbr\u003eTen Pounds : \u003ca href=\"https:\/\/sheffield-pottery.myshopify.com\/products\/light-ceramic-grade-calcined-rutile-rmrutlig10\"\u003e https:\/\/www.sheffield-pottery.com\/Light-Ceramic-Gr...\u003c\/a\u003e\u003cbr\u003e50 Pounds :\u003ca href=\"https:\/\/sheffield-pottery.myshopify.com\/products\/light-ceramic-grade-calcined-rutile-rmrutlig50\"\u003ehttps:\/\/sheffield-pottery.myshopify.com\/products\/light-ceramic-grade-calcined-rutile-rmrutlig50\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e Photo: Taken by Aram Dulyan\u003cbr\u003e Date: 23'FEB 2005\u003cbr\u003e Tuft of brown needles of rutile protruding from a quartz crystal, from Brazil. Photograph taken at the Natural History Museum, London.","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45113743081794,"sku":"RMRUTDAR","price":13.55,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67294140105075,"sku":"RMRUTDAR-5","price":62.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67294140137843,"sku":"RMRUTDAR-10","price":120.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67294140170611,"sku":"RMRUTDAR-25","price":287.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67294140203379,"sku":"RMRUTDAR-50","price":520.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMRUTDAR-2.jpg?v=1696949366"},{"product_id":"soda-ash-grade-100-natural-10-pounds-rmsodash100","title":"Soda Ash, Grade 100","description":"\u003ch2 data-start=\"208\" data-end=\"229\"\u003eWhat is Soda Ash\u003c\/h2\u003e\n\u003cp data-start=\"230\" data-end=\"775\"\u003eSoda ash is the trade-name for \u003cstrong data-start=\"261\" data-end=\"290\"\u003esodium carbonate (Na₂CO₃)\u003c\/strong\u003e — an inorganic, white, odorless, crystalline or powdered alkali. Historically derived from plant ashes (hence “ash”) and still produced today by refining trona ore or via synthetic chemical processes.  Chemically it dissolves in water to form a strongly alkaline solution, making it a powerful flux, pH-adjuster and deflocculant in many industrial and ceramic contexts. \u003c\/p\u003e\n\u003ch3 data-start=\"1031\" data-end=\"1060\"\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul data-start=\"1061\" data-end=\"2089\"\u003e\n\u003cli data-start=\"1061\" data-end=\"1183\"\u003e\n\u003cp data-start=\"1063\" data-end=\"1183\"\u003eRefined sodium carbonate (Na₂CO₃) in a highly pure, granulated or powdered form. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/www.ansac.com\/products\/about-soda-ash\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.ansac.com\/products\/about-soda-ash\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1184\" data-end=\"1401\"\u003e\n\u003cp data-start=\"1186\" data-end=\"1401\"\u003eActs as a \u003cstrong data-start=\"1196\" data-end=\"1204\"\u003eflux\u003c\/strong\u003e in glaze and glass contexts: by introducing the sodium oxide (Na₂O) component, soda ash lowers melting points and enhances fluidity in silica-based systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1402\" data-end=\"1618\"\u003e\n\u003cp data-start=\"1404\" data-end=\"1618\"\u003eFunctions as a \u003cstrong data-start=\"1419\" data-end=\"1435\"\u003edeflocculant\u003c\/strong\u003e and \u003cstrong data-start=\"1440\" data-end=\"1461\"\u003erheology modifier\u003c\/strong\u003e in ceramic slips and casting bodies — helping to maintain fluidity, reduce settling and control casting performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1619\" data-end=\"1917\"\u003e\n\u003cp data-start=\"1621\" data-end=\"1917\"\u003eEnables advanced surface effects through \u003cstrong data-start=\"1662\" data-end=\"1688\"\u003esoda-firing techniques\u003c\/strong\u003e in pottery: when introduced into a kiln atmosphere or applied to bisque, sodium vapour interacts with silica\/alumina surfaces to yield unique textures, flashing, and “orange peel” effects. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1918\" data-end=\"2089\"\u003e\n\u003cp data-start=\"1920\" data-end=\"2089\"\u003eFormat optimized for studio use: convenient for material formulation, glaze labs, ceramic educators and creative potters aiming for consistent control and repeatability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2096\" data-end=\"2122\"\u003eTypical Applications of Soda Ash\u003c\/h2\u003e\n\u003cul data-start=\"2123\" data-end=\"2852\"\u003e\n\u003cli data-start=\"2123\" data-end=\"2236\"\u003e\n\u003cp data-start=\"2125\" data-end=\"2236\"\u003e\u003cstrong data-start=\"2125\" data-end=\"2160\"\u003eGlaze formulation \u0026amp; body design\u003c\/strong\u003e: Use soda ash for formulating sodium-rich glazes, frits or flux packages.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2237\" data-end=\"2365\"\u003e\n\u003cp data-start=\"2239\" data-end=\"2365\"\u003e\u003cstrong data-start=\"2239\" data-end=\"2267\"\u003eCasting\/slip preparation\u003c\/strong\u003e: Incorporate into slip recipes to fine-tune flow and deflocculation behaviour in casting molds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2366\" data-end=\"2534\"\u003e\n\u003cp data-start=\"2368\" data-end=\"2534\"\u003e\u003cstrong data-start=\"2368\" data-end=\"2401\"\u003eSoda kiln or soda\/fume firing\u003c\/strong\u003e: Apply soda ash via solution spray, brine dip or direct application in kiln to generate sodium vapour and reactive glaze surfaces.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2535\" data-end=\"2652\"\u003e\n\u003cp data-start=\"2537\" data-end=\"2652\"\u003e\u003cstrong data-start=\"2537\" data-end=\"2572\"\u003eExperimental surface treatments\u003c\/strong\u003e: Use for creating dynamic, reactive surfaces in stoneware and high-fire work.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2653\" data-end=\"2852\"\u003e\n\u003cp data-start=\"2655\" data-end=\"2852\"\u003e\u003cstrong data-start=\"2655\" data-end=\"2691\"\u003eIndustrial\/ceramic raw materials\u003c\/strong\u003e: Although your focus is studio ceramics, it also feeds into glass, detergent, metallurgical and water-treatment sectors. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/www.etisoda.com\/en\/soda-ash-used\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.etisoda.com\/en\/soda-ash-used\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2859\" data-end=\"2890\"\u003eTechnical \u0026amp; Handling Info\u003c\/h2\u003e\n\u003cul data-start=\"2891\" data-end=\"3783\"\u003e\n\u003cli data-start=\"2891\" data-end=\"3019\"\u003e\n\u003cp data-start=\"2893\" data-end=\"3019\"\u003eChemical formula: \u003cstrong data-start=\"2911\" data-end=\"2921\"\u003eNa₂CO₃\u003c\/strong\u003e (sodium carbonate) — anhydrous or lightly hydrated forms. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/byjus.com\/chemistry\/soda-ash\/?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/byjus.com\/chemistry\/soda-ash\/?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3020\" data-end=\"3129\"\u003e\n\u003cp data-start=\"3022\" data-end=\"3129\"\u003eAppearance: White granular or powder form, odorless, water-soluble.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3130\" data-end=\"3276\"\u003e\n\u003cp data-start=\"3132\" data-end=\"3276\"\u003eSolubility: Highly soluble in water; forms alkaline solution (pH ~11 for 1 % solution) when dissolved. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3277\" data-end=\"3372\"\u003e\n\u003cp data-start=\"3279\" data-end=\"3372\"\u003eStorage: Keep in a cool, dry place, sealed container to prevent moisture uptake and caking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3373\" data-end=\"3561\"\u003e\n\u003cp data-start=\"3375\" data-end=\"3561\"\u003eSafety: While not highly hazardous, sodium carbonate is alkaline and can cause irritation to skin\/eyes. Use gloves and eye protection when handling powder and avoid inhaling fine dust.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3562\" data-end=\"3783\"\u003e\n\u003cp data-start=\"3564\" data-end=\"3783\"\u003eNote for ceramic use: Because it is water-soluble, soda ash is \u003cstrong data-start=\"3627\" data-end=\"3682\"\u003enot normally used as a direct Na₂O source in glazes\u003c\/strong\u003e, unless captured in a frit — it tends to migrate or leach. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/digitalfire.com\/material\/sodium%2Bcarbonate?utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/digitalfire.com\/material\/sodium%2Bcarbonate?utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"3790\" data-end=\"3820\"\u003eWhy Choose This Product?\u003c\/h3\u003e\n\u003cp data-start=\"3821\" data-end=\"4166\"\u003eWhether you’re a studio potter, glaze lab technician or ceramic instructor, this soda ash offers cost-effective, consistent and high-purity performance. Use it to elevate your glaze chemistry, fine-tune slip behaviour or explore reactive soda-firing surfaces. It’s a flexible raw material for anyone serious about craft, formulation and results.\u003c\/p\u003e\n\u003ch2 data-start=\"4173\" data-end=\"4241\"\u003eUse \u0026amp; Application Tips (Staff-College style “Order of Battle”)\u003c\/h2\u003e\n\u003col data-start=\"4242\" data-end=\"5567\"\u003e\n\u003cli data-start=\"4242\" data-end=\"4418\"\u003e\n\u003cp data-start=\"4245\" data-end=\"4418\"\u003e\u003cstrong data-start=\"4245\" data-end=\"4268\"\u003eRecon \u0026amp; Preparation\u003c\/strong\u003e: Review your glaze or slip formulation. Determine how introducing sodium will shift behaviour (fluxing speed, gloss, adherence, thermal expansion).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4419\" data-end=\"4784\"\u003e\n\u003cp data-start=\"4422\" data-end=\"4784\"\u003e\u003cstrong data-start=\"4422\" data-end=\"4436\"\u003eDeployment\u003c\/strong\u003e: For slips: add soda ash at low percentages (e.g., ~0.1-0.3% by weight of dry body) along with sodium silicate to achieve deflocculation. For glazes\/firing: dissolve in warm\/hot water for spraying or apply as a “wash” for soda effect. (Many potters use ~1 lb soda ash per gallon hot water for soda spray). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4785\" data-end=\"5027\"\u003e\n\u003cp data-start=\"4788\" data-end=\"5027\"\u003e\u003cstrong data-start=\"4788\" data-end=\"4802\"\u003eMonitoring\u003c\/strong\u003e: Track changes in casting time, slip settling, glaze draw-down and fired surface characteristics. Because sodium oxide is highly reactive, adjust other fluxes or silica levels accordingly to avoid over-melting or crawling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5028\" data-end=\"5282\"\u003e\n\u003cp data-start=\"5031\" data-end=\"5282\"\u003e\u003cstrong data-start=\"5031\" data-end=\"5059\"\u003eAfter-Action Maintenance\u003c\/strong\u003e: Store remaining soda ash dry, label clearly (“technical grade sodium carbonate – for ceramic raw material use”), maintain MSDS on file. Clean tools and containers to prevent sodium contamination in unintended processes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5283\" data-end=\"5567\"\u003e\n\u003cp data-start=\"5286\" data-end=\"5567\"\u003e\u003cstrong data-start=\"5286\" data-end=\"5311\"\u003eContingency \/ Scaling\u003c\/strong\u003e: Keep sample batches and test charts before full scale. If shifting from small studio batches to large runs, monitor kiln lining wear (sodium vapours can affect kiln bricks over time) and ventilation requirements. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286211428723,"sku":"RMSODASH100-1","price":1.7,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286211461491,"sku":"RMSODASH100-5","price":7.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":45113748947266,"sku":"RMSODASH100","price":14.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286211494259,"sku":"RMSODASH100-25","price":33.75,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286211527027,"sku":"RMSODASH10050","price":52.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/71602jZg7hL._AC_UF1000_1000_QL80_bf8ee81c-3195-47ec-ae9c-f649bf4395cf.jpg?v=1791876724"},{"product_id":"strontium-carbonate-powder-rmstrcarp","title":"Strontium Carbonate","description":"\u003cspan\u003e\u003c\/span\u003eSTRONTIUM CARBONATE - Powder","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45113752682818,"sku":"RMSTRCARP","price":7.2,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286209560947,"sku":"RMSTRCARP-5","price":33.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286209593715,"sku":"RMSTRCARP-10","price":66.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286209626483,"sku":"RMSTRCARP-25","price":162.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286209659251,"sku":"RMSTRCARP-50","price":162.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/strontium_611x_493b888d-ea09-4eb5-9953-d582ce51e618.jpg?v=1791876725"},{"product_id":"tin-oxide-five-pounds-rmtinoxi","title":"Tin Oxide","description":"\u003cp\u003e\u003cstrong\u003eThe classic opacifier for soft, warm whites and majolica, and the tin in copper reds.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eAn opacifier: a white powder that turns a clear glaze into an opaque white. Tin white is softer and warmer than zircon white, and it's the traditional white of majolica pottery. Small amounts also help copper red glazes develop their color.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor an opaque white, start at 5% (5 grams per 100 grams of dry glaze). Most glazes are fully white by 7 to 10%.\u003c\/li\u003e\n\u003cli\u003eFor copper reds, recipes usually use about 1%.\u003c\/li\u003e\n\u003cli\u003eTin is expensive. For a lower-cost white, a zircon opacifier like Ultrox works, though the white is cooler and brighter.\u003c\/li\u003e\n\u003cli\u003eKeep tin glazes away from chrome. Even chrome in a nearby pot in the same kiln can turn a tin glaze pink.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTin oxide, SnO₂. Stays in the glaze as tiny undissolved particles that scatter light.\u003c\/li\u003e\n\u003cli\u003eStronger per gram than zircon: zircon opacifiers typically need about 1.5 to 2 times as much for similar opacity.\u003c\/li\u003e\n\u003cli\u003eWith chrome: pinks and reds (chrome-tin pink).\u003c\/li\u003e\n\u003cli\u003eUsed in copper reds and lustre glazes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$58.10\u003c\/td\u003e\n\u003ctd\u003e$58.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$276.50\u003c\/td\u003e\n\u003ctd\u003e$55.30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$525.50\u003c\/td\u003e\n\u003ctd\u003e$52.55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$1,245.00\u003c\/td\u003e\n\u003ctd\u003e$49.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$2,281.50\u003c\/td\u003e\n\u003ctd\u003e$41.48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":52631297786227,"sku":"RMTINOXI","price":58.1,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52631297818995,"sku":"RMTINOXI5","price":276.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52631297851763,"sku":"RMTINOXI10","price":525.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52631297884531,"sku":"RMTINOXI25","price":1245.0,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":52631297917299,"sku":"RMTINOXI55","price":2281.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/RMTINOXI-2_e387f4cc-4efd-4416-ac5c-936fdb36181f.jpg?v=1791876724"},{"product_id":"ultrox-zirconium-glaze-opacifier-rmultzir","title":"Ultrox: Zirconium Glaze Opacifier","description":"\u003cp\u003e\u003cstrong\u003eA zircon opacifier for bright, clean whites at a fraction of the cost of tin. Use it wherever a recipe lists Zircopax.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eAn opacifier: a white powder (zirconium silicate) that turns a clear glaze into an opaque white. Zircon whites are brighter and cooler than tin whites and cost much less. Ultrox is made to substitute for Zircopax in your recipes without other changes, but test it first.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor an opaque white, start at 8 to 10% (8 to 10 grams per 100 grams of dry glaze). Many glazes use up to 15%.\u003c\/li\u003e\n\u003cli\u003eIf your recipe lists Zircopax, Superpax or \"zircon,\" use Ultrox in the same amount, then fire a test tile.\u003c\/li\u003e\n\u003cli\u003eIt also whitens slips and engobes and softens colors toward pastels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eZirconium silicate, ZrSiO₄.\u003c\/li\u003e\n\u003cli\u003eStiffens the melt at higher amounts and can push glossy glazes toward satin.\u003c\/li\u003e\n\u003cli\u003eLowers glaze thermal expansion, which can help reduce crazing.\u003c\/li\u003e\n\u003cli\u003eStable with most colorants. Unlike tin, it doesn't turn pink with chrome.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$5.15\u003c\/td\u003e\n\u003ctd\u003e$5.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$25.00\u003c\/td\u003e\n\u003ctd\u003e$5.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$49.00\u003c\/td\u003e\n\u003ctd\u003e$4.90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$120.00\u003c\/td\u003e\n\u003ctd\u003e$4.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$247.50\u003c\/td\u003e\n\u003ctd\u003e$4.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials. That total sets the price level for every bag. For example, ten 50 lb bags of any materials add up to 500 lb, so each bag gets the 500 lb price. Smaller sizes don't count toward the total.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFull-bag pounds in your order\u003c\/th\u003e\n\u003cth\u003ePrice per 55 lb bag\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnder 500 lb\u003c\/td\u003e\n\u003ctd\u003e$247.50\u003c\/td\u003e\n\u003ctd\u003e$4.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 lb and up\u003c\/td\u003e\n\u003ctd\u003e$243.00\u003c\/td\u003e\n\u003ctd\u003e$4.42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$238.00\u003c\/td\u003e\n\u003ctd\u003e$4.33\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$233.00\u003c\/td\u003e\n\u003ctd\u003e$4.24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$228.00\u003c\/td\u003e\n\u003ctd\u003e$4.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45113758384450,"sku":"RMULTZIR","price":5.15,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286165586291,"sku":"RMULTZIR-5","price":25.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286165619059,"sku":"RMULTZIR-10","price":49.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286165651827,"sku":"RMULTZIR-25","price":120.0,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286165684595,"sku":"RMULTZIR50","price":247.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/large-Ziropax_powder_1_5f0fef53-8b76-415e-9cec-ab5d075d8ef1.jpg?v=1791876724"},{"product_id":"burnt-umber-raw-material-one-pound-rmumbbur","title":"Burnt Umber","description":"\u003cp\u003e\u003cstrong\u003eA natural brown earth for brushwork, washes and darker clay bodies.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA natural brown earth made of iron oxide with some manganese, heated (\"burnt\") to deepen its color. Potters brush it on as a decorating wash for reddish-browns, and mix it into clay to darken it.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAs a wash, mix it with water, brush it onto bisqueware, and wipe it back so color stays in the texture. Test it under and over your clear glaze.\u003c\/li\u003e\n\u003cli\u003eIn clay or slip, start around 2 to 5% for a darker body.\u003c\/li\u003e\n\u003cli\u003eIn a glaze, start at 2 to 3% for warm browns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCalcined natural earth: iron oxide with manganese oxide. Because it's dug from the ground, the iron-to-manganese ratio varies from lot to lot.\u003c\/li\u003e\n\u003cli\u003eThe manganese can cause blistering at higher amounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eContains manganese, which gives off harmful fumes during firing. Vent your kiln and stay out of the kiln room while it fires.\u003c\/li\u003e\n\u003cli\u003eWear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eOn food surfaces, keep it under a stable, tested glaze, and have the finished piece lab-tested before you sell it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$6.65\u003c\/td\u003e\n\u003ctd\u003e$6.65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$30.75\u003c\/td\u003e\n\u003ctd\u003e$6.15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$59.00\u003c\/td\u003e\n\u003ctd\u003e$5.90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$141.25\u003c\/td\u003e\n\u003ctd\u003e$5.65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50 lb bag\u003c\/td\u003e\n\u003ctd\u003e$255.00\u003c\/td\u003e\n\u003ctd\u003e$5.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials; that total sets the price level for each bag. Smaller sizes don't count. This material's bag price stays the same at every level, but its weight still counts toward your total.\u003c\/p\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45113759007042,"sku":"RMUMBBUR","price":6.65,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286164341107,"sku":"RMUMBBUR-5","price":30.75,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286164373875,"sku":"RMUMBBUR-10","price":59.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286164406643,"sku":"RMUMBBUR-25","price":141.25,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286164439411,"sku":"RMUMBBUR-50","price":255.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Burnt_Umber_1.jpg?v=1724433608"},{"product_id":"whiting-snocal-40-10-pounds-rmwhisno","title":"Whiting Snocal 40 (for Glazes)","description":"\u003cp\u003e\u003cspan\u003e\u003c\/span\u003eWhiting snocal 40.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286205923699,"sku":"RMWHISNO-1","price":2.4,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286205956467,"sku":"RMWHISNO-5","price":11.25,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":45113763004738,"sku":"RMWHISNO","price":21.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286205989235,"sku":"RMWHISNO-25","price":51.25,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286206022003,"sku":"RMWHISNO55","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/l_15457.5de7d47035ff4_985877d0-e7f5-4ac2-9c7a-04f96e840b30.jpg?v=1724435236"},{"product_id":"whiting-vicron-2511-50-pounds-rmwhivic50","title":"Whiting Vicron 2511 (for Clay and Slip)","description":"\u003cspan\u003e\u003c\/span\u003eWHITING VICRON 2511 : 50 pound bag\u003cbr\u003e","brand":"Sheffield Pottery","offers":[{"title":"5 Pounds","offer_id":67286206087539,"sku":"RMWHIVIC-5","price":9.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286206120307,"sku":"RMWHIVIC","price":17.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286206153075,"sku":"RMWHIVIC-25","price":40.0,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":45113764708674,"sku":"RMWHIVIC50","price":39.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/whiting.jpg?v=1759773706"},{"product_id":"zinc-oxide-french-process-55-pound-bag-rmzinoxi","title":"Zinc Oxide, French Process","description":"\u003cspan\u003e\u003c\/span\u003e\u003ch2 class=\"abz-seo-product\"\u003eFrench Process ZINC OXIDE\u003c\/h2\u003eOur zinc oxide is prepared using the indirect process aka \"French Process\".\u003cbr\u003eThe zinc is vaporized. In the vaporized state the zinc is able to pick up an oxygen atom from the atmosphere and become ZnO.","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":45113766936898,"sku":"RMZINOXI","price":5.95,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286210445683,"sku":"RMZINOXI-5","price":29.0,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286210478451,"sku":"RMZINOXI-10","price":57.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286210511219,"sku":"RMZINOXI-25","price":140.0,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286210543987,"sku":"RMZINOXIBAG","price":289.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/whiting.jpg?v=1759773706"},{"product_id":"iron-oxide-spanish-red-1-pounds","title":"Iron Oxide, Spanish Red","description":"\u003cp\u003e\u003cstrong\u003eThe most useful colorant in pottery: ambers, browns, celadons, tenmokus, and warm red-brown clays and slips.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTest before you use it, at any scale.\u003c\/strong\u003e Raw materials are mined, and they are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA fine red powder: iron oxide, the same compound as rust. It's the go-to colorant for warm colors. It gives honey and amber in a clear glaze, browns and blacks at higher amounts, and pale green celadons in a gas kiln fired in reduction (with less oxygen). It also warms and darkens clay bodies and slips.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIn a clear glaze, about 1 to 3% (1 to 3 grams per 100 grams of dry glaze) gives honey to amber, 4 to 7% medium to dark brown, and 8 to 12% very dark brown to black.\u003c\/li\u003e\n\u003cli\u003eFor celadon in a gas reduction kiln, start at 0.5 to 2%.\u003c\/li\u003e\n\u003cli\u003eIn clay or slip, start around 2 to 5%.\u003c\/li\u003e\n\u003cli\u003eResults change a lot between electric and gas kilns. Fire a test tile in your own kiln.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRed iron oxide, Fe₂O₃.\u003c\/li\u003e\n\u003cli\u003eA strong flux in reduction, where it converts to FeO, so high-iron glazes run more in gas kilns than in electric ones.\u003c\/li\u003e\n\u003cli\u003eHigh-iron glazes can bubble or blister as the iron gives up oxygen in firing.\u003c\/li\u003e\n\u003cli\u003eName note: this material was sold as \"Superfine\" and is now sold as Micronox. It's the same material.\u003c\/li\u003e\n\u003cli\u003eThe product photo is a general one; color tone varies from lot to lot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eIt stains skin, clothes and work surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003ctd\u003e$3.05\u003c\/td\u003e\n\u003ctd\u003e$3.05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5 lb\u003c\/td\u003e\n\u003ctd\u003e$14.50\u003c\/td\u003e\n\u003ctd\u003e$2.90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003ctd\u003e$28.00\u003c\/td\u003e\n\u003ctd\u003e$2.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 lb\u003c\/td\u003e\n\u003ctd\u003e$67.50\u003c\/td\u003e\n\u003ctd\u003e$2.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 lb bag\u003c\/td\u003e\n\u003ctd\u003e$99.00\u003c\/td\u003e\n\u003ctd\u003e$1.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFull bags: mix and match.\u003c\/strong\u003e Add up the weight of every full bag in your order, across all raw materials. That total sets the price level for every bag. For example, ten 50 lb bags of any materials add up to 500 lb, so each bag gets the 500 lb price. Smaller sizes don't count toward the total.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFull-bag pounds in your order\u003c\/th\u003e\n\u003cth\u003ePrice per 55 lb bag\u003c\/th\u003e\n\u003cth\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnder 500 lb\u003c\/td\u003e\n\u003ctd\u003e$99.00\u003c\/td\u003e\n\u003ctd\u003e$1.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 lb and up\u003c\/td\u003e\n\u003ctd\u003e$98.50\u003c\/td\u003e\n\u003ctd\u003e$1.79\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$98.00\u003c\/td\u003e\n\u003ctd\u003e$1.78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$97.50\u003c\/td\u003e\n\u003ctd\u003e$1.77\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12,000 lb and up\u003c\/td\u003e\n\u003ctd\u003e$97.00\u003c\/td\u003e\n\u003ctd\u003e$1.76\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":49598731387202,"sku":"RMIROOXISR1","price":3.05,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286165225843,"sku":"RMIROOXISR","price":14.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286165258611,"sku":"RMIROOXISR-10","price":28.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286165291379,"sku":"RMIROOXISR-25","price":67.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286165324147,"sku":"RMIROOXISR55","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMIROOXISR-2.jpg?v=1696880143"}],"url":"https:\/\/www.sheffield-pottery.com\/collections\/raw-materials-oxides-and-carbonates.oembed","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}