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Coyote Glazes: Safety Info and Glazing and Firing Tips, Suggestions


Liquid Glazes

Product labeling; All of our glazes have been evaluated by an independent toxicologist and are properly labeled in accordance with ASTM D-4236. In liquid form none require any warning statement other than "conforms to ASTM D-4236".

Product Safety; All Coyote liquid glazes are non-toxic under proposed use conditions (brushing, pouring, and dipping). For spray application warnings apply (see warnings for dry glazes). All of our glazes are lead free, all but eighteen are cadmium free; however none of these glazes should be taken internally as they contain ingredients not suitable for ingestion or inhalation.

Dry Glazes and Spray Application

Product labeling; All of our lead free glazes have been evaluated by an independent toxicologist and are properly labeled in accordance with ASTM D-4236. Dry glazes have the following statement;

WARNING: This glaze contains QUARTZ (SILICA), and may contain COBALT, CHROMIUM AND CADMIUM.

Possible cancer agent based on tests with laboratory animals.

Exposure may cause lung damage.

Keep out of reach of children.

Avoid inhalation.

Product Safety; All Coyote dry glazes contain quartz (silica), and some contain cobalt, chromium and cadmium. Avoid creating dust, use an OSHA approved respirator and local exhaust. All of our glazes are lead free, all but eighteen are cadmium free; however none of these glazes should be taken internally as they contain ingredients not suitable for ingestion or inhalation.

Glazes containing cobalt; Blue Shino, Blue Purple, Blue Slate, Blue Matt, Ice Blue, Opal, Pam's Blue, Purple Matt, Oasis.

Glazes containing chromium; Almost Teal, Blue Green, Cactus Green, Chrome Green and Pam's Green.

Glazes containing cadmium (in the form of inclusion stains); Buttercup, Butterscotch Shino, Cedar Shino, Cherry Satin, Coral Satin, Fire Opal, Lemon Cream Satin, Orange, Peachy Shino, Plum Shino, Pumpkin, Really Red, Red, Red Crawl, Red Orange, Rhubarb, Sunrise Shino and Sunset Pink.

Food Safety

Currently the only materials that are regulated by the FDA regarding food safety in ceramic glazes are lead and cadmium. All Coyote glazes are lead free, and the eighteen that contain cadmium (in the form of inclusion stains) have, in our testing ,passed cadmium release tests when properly fired. We also recommend that the softer (matt) glazes not be used for food use as they may change color or texture with repeated use.

Buttercup, Butterscotch Shino, Cedar Shino, Cherry Satin, Coral Satin, Fire Opal, Lemon Cream Satin, Orange, Peachy Shino, Plum Shino, Pumpkin, Really Red, Red, Red Crawl, Red Orange, Rhubarb, Sunrise Shino and Sunset Pink. contain Cadmium in the form of inclusion stains; in our testing, all of these glazes passed leaching tests for cadmium release, however due to the many variables in firing, we recommend that ware produced for sale be tested by the potter at an approved laboratory before it is marketed. You can find lab testing information at Brandywine Science Center .

Blue Matt, Green Matt, Green Shino, Iron Matt, Purple Matt and Turquoise are not recommended for food use. May change color or texture with repeated exposure to food and dishwasher detergents. The Crawl glazes are not recommended for food use.




Eggplant with Black liner







Glazing

Some pottery glazes are very runny (see following list of info on each glaze). If you want to double dip glazes, only do so on the inside or the top half of the exterior. If your piece is glazed right to the foot, has double or triple dipped glaze on the whole piece or has glaze flaking off, it will probably run.

Basic Glazing Instructions

First you want to apply wax resist to the foot of your pot (where you don't want any glaze). When you dip your pot in a bucket of glaze, the glaze won't stick where you have waxed. The glazes become molten glass in the kiln, so if there is any glaze on the bottom, your pot will STICK; that wrecks your pot and kiln shelves! Paint a thin coat of wax on the bottom, as well as up the sides at least ¼ inch; all glazes move a little in the firing, and some are quite runny. Always leave enough room for your glaze to flow some without sticking to the kiln shelf. Until you are familiar with a particular glaze, it is better to leave some extra room.

Things to remember when waxing feet:

Use a thin coat of wax, it works better. Let the wax dry for at least 15 or 20 minutes before dipping pot in glaze. Use an old cruddy brush; they are never the same after using with wax. Clean your wax brush in warm water with a drop or two of dish washing soap. Be careful not to get the wax where you don't want it, i.e. waxy fingerprints. Before you glaze your work, you should quickly rinse it under cold water. Thoroughly mix the glaze just before you use it.

Dipping

To coat the whole piece in a single glaze, the easiest technique is to pick it up with a pair of glaze tongs, dip it in, count to three and pull it out. Make sure to empty it as you withdraw it; if you pull a bowl out still full of glaze it will weigh so much that the tongs will break through. Hold it upside down over the bucket to drain the excess glaze. There will probably be some glaze sticking to the waxed areas; wipe off what you can while you are holding it with the tongs. Set the piece down and let it dry. After it is dry enough to handle, turn it over and sponge off any glaze still remaining on the bottom. The foot must be perfectly clean before it can go in a kiln.

Brushing

For brushing, most glazes need 2 to 3 coats. It is easier to get even coverage if you brush the first coat side to side, then the next coat up and down.

Firing

These glazes work best when fired between cone 5 and 6 (Orton large cones); If you use a Kiln Sitter you usually have to use a cone six in the sitter to achieve a good cone 5. For automatic kilns we fire to cone 5 (fast) with a 15 minute hold. Every kiln is different, so you may have to fine tune your firing to achieve the best results.

The Glazes:


Almost Teal
Single dip (2-3 coats brushed); Very stable; no running, no breaking.

Archie's Base
Single dip (2-3 coats brushed); slightly runny, breaks tan to pink. Good over slips, underglazes and other glazes. Try it over Almost Teal, Chrome Green, etc.

Black
Single dip (2-3 coats brushed); Very stable, no running, no breaking. Nice under Shino or Archie's.

Blue Green
Single dip (2-3 coats brushed) Very stable, no running, no breaking.

Blue Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on the piece when dry, like a dried-up lake bed, but not so thick that it flakes off of the piece. Where the glaze is thicker, the crawl size is larger. Where thinner, the crawl size is smaller. Not recommended for food use..

Blue Matt
Single dip (2-3 coats brushed) Fairly stable, light blue where thick, yellowish where thin.
Not recommended for food use; may change color/texture.

Blue Shino
Single dip (2-3 coats brushed) Fairly stable, medium blue where thick, breaks to orange/brown over texture and where thin.
Blue Purple
Runny! Single Dip (2-3 coats brushed) Blue purple where thin, breaking to darker blue where thick. This glaze is very pretty if you dip the whole piece once, then dip the rim or the top third or so a second time (not the whole piece!). Nice when overlapped with gun metal green, red gold or archies base. Great over almost teal.

Blue Slate
Single dip (2-3 coats brushed) Fairly stable, blue-grey where thick, breaks to dark brown over texture and where thin.

Buttercup
Single dip (2-3 coats brushed) no running, no breaking.

Cactus Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on the piece when dry, like a dried-up lake bed, but not so thick that it flakes off of the piece. Where the glaze is thicker, the crawl size is larger. Where thinner, the crawl size is smaller. Not recommended for food use.

Cactus Green
Single dip (2-3 coats brushed) a little running, a little breaking

Chocolate Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on the piece when dry, like a dried-up lake bed, but not so thick that it flakes off of the piece. Where the glaze is thicker, the crawl size is larger. Where thinner, the crawl size is smaller. Not recommended for food use.

Chrome Green
Single dip (2-3 coats brushed) no running, no breaking. Nice under Archie's.

Cinnamon Stick
Single dip (2-3 coats brushed) no running, no breaking. Red gold is very nice over cinnamon.

Clear
Single dip (2-3 coats brushed) very stable. Gets milky if applied too thick. Good over underglazes.

Cobalt Blue
Single dip (2-3 coats brushed) no running, no breaking. Nice under oasis blue, mottled blue, shino, etc.

Copper Blue
Runny! Single dip (2-3 coats brushed) Light blue in electric, very nice in gas firing.

Crazed Copper
Runny!! Single dip (2-3 coats brushed) Apply a stable glaze to the bottom 1/3 of your pot, then overlap the Crazed Copper slightly (black looks good), helps keep it from running. Fires translucent turquoise in the electric kiln, red in the gas kiln.

Creamy Matt
Single dip (2-3 coats brushed) fairly stable, no breaking.

Creamy Matt w/Specks
Single dip (2-3 coats brushed) fairly stable, no breaking

Croc Blue
Single dip (2-3 coats brushed) no running, some breaking

Dark Brown
Single dip (2-3 coats brushed) no running, no breaking

Dark Shino
Single dip (2-3 coats brushed).

Eggplant
Single dip (2-3 coats brushed) no running, breaks to blue/green where thin.

Eggshell
Single dip (2-3 coats brushed) no running, no breaking

Espresso Bean
Single dip (2-3 coats brushed) no running, breaks and from dark brown to black.

Fire Opal
Single dip (2-3 coats brushed) little running, some breaking
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Green Matt
Fairly Stable; single dip (2-3 coats brushed) Some mottling.
Not recommended for food use; may change color/texture.

Green Shino
Single dip (2-3 coats brushed) Great glaze, very reliable. Shiny green, breaks to orange/brown where thin.
Not recommended for food use; may change color/texture.

Gun Metal Green
Runny!! Single dip (2-3 coats brushed) Green breaks to metallic black. Nice over other glazes, top part of piece only!

Ice Blue
Runny!! Single dip (2-3 coats brushed) Lighter blue breaks to darker blue where thick. Nice over other glazes (try it over black!), top part of piece only!

Iron Matt
Fairly stable; single dip (2-3 coats brushed) Some mottling.
Not recommended for food use; may change color/texture.

JB'S Brown
Very reliable! Single dip (2-3 coats brushed) no running, some breaking.

Light Blue
Single dip (2-3 coats brushed). No running, no breaking.

Light Blue Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over texture, slips, underglazes and other glazes. Try it over black, red, cobalt blue, etc.

Light Green Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over texture, slips, underglazes and other glazes. Try it over black, red, cobalt blue, etc.

Light Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over texture, slips, underglazes and other glazes. Try it over black, red, cobalt blue, etc.

Malt
Single dip (2-3 coats brushed) no running, no breaking.

Medium Blue
Single dip (2-3 coats brushed) no running, no breaking.

Mint
Single dip (2-3 coats brushed) no running, no breaking.

Mottled Blue
Very reliable! Single dip (2-3 coats brushed) no running, some breaking. Use with cobalt blue under or over.

Oasis Blue
Runny. Single Dip (2-3 coats brushed) Try it thicker on the inside of a bowl and thinner on the outside so it doesn't run. Nice blue in the electric, breaks into multiple colors in the gas. Good over slips; nice over cobalt blue (inside only! It's runny!)

Oatmeal
Single dip (2-3 coats brushed) no running, lots of specks.

Opal
Runny. Single Dip (2-3 coats brushed) Try it thicker on the inside of a bowl and thinner on the outside so it doesn't run. Nice varied blue.

Orange
Single dip, (2-3 coats brushed) No running, no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Pam's Blue
Single dip (2-3 coats brushed) slightly runny. Breaks blue/grey/black.

Pam's Green
Single dip (2-3 coats brushed) slightly runny. Breaks green/brown/black.

Pansy Purple
Single dip, (2-3 coats brushed) No running, no breaking.

Peaches & Cream
Single dip (2-3 coats brushed) no running, no breaking.

Pumpkin
Single dip, (2-3 coats brushed) No running, no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Purple Matt
Single dip (2-3 coats brushed) no running, no breaking.
Not recommended for food use; may change color/texture.

Really Red
Single dip (2-3 coats brushed) No running, no breaking. It's REALLY red!
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Red Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on the piece when dry, like a dried-up lake bed, but not so thick that it flakes off of the piece. Where the glaze is thicker, the crawl size is larger. Where thinner, the crawl size is smaller. Not recommended for food use. Contains cadmium inclusion stain

Red
Single dip (2-3 coats brushed) No running, no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Red Gold
Runny!! Single dip (2-3 coats brushed) Breaks to blue where thick. Nice over other glazes. Try it over cinnamon stick, top part of piece only!

Red Orange
Single dip (2-3 coats brushed) No running, no breaking.
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Rhubarb
Single dip (2-3 coats brushed); slightly runny, breaks tan to deep pink. Good over slips, underglazes and other glazes. Try it over Almost Teal, Chrome Green, etc.
Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Royal Blue
Single dip (2-3 coats brushed) no running, no breaking.

Rust Brown
Single dip (2-3 coats brushed) Fairly stable, don't apply too thin. Breaks brown to tan.

Saturated Iron

Single dip (2-3 coats brushed); slightly runny. Try it under shino.

Shino
Single dip (2-3 coats brushed) Great glaze, very reliable, NICE over texture, slips, underglazes and other glazes. Try it over black, red, cobalt blue, etc.

Sunset Pink
Single dip (2-3 coats brushed) little running, some breaking, Contains cadmium inclusion stain; lab test for cadmium release before selling dinnerware.

Toshi Brown
Single dip (2-3 coats brushed) No running, some breaking..

Turquoise
Single dip (2-3 coats brushed) don't apply to thin .No running.. Some red in the gas kiln.
Not recommended for food use; may change color/texture.

Violet
Single dip (2-3 coats brushed) No running, no breaking.

Waxy Lavender
Single dip(2-3 coats brushed) No running, no breaking.

WhiteSingle dip (2-3 coats brushed) no running, no breaking.

White Crawl
This glaze need several coats brushing. Apply glaze until it starts to crack on the piece when dry, like a dried-up lake bed, but not so thick that it flakes off of the piece. Where the glaze is thicker, the crawl size is larger. Where thinner, the crawl size is smaller. Not recommended for food use.

Yellow Orange
Single dip (2-3 coats brushed) No running, no breaking.
Coyote Glazes : Tips, Application, and Safety