Spectrum High Fire Glazes include these series: Choose your subcategory above.
1100 Series Cone 4/6 "Stoneware" Glazes
1200 Series Cone 9/10 Glazes
1500 Series NOVA Dipping Glazes in Gallon Pails and now in pints for brushing as well. c4/6
1400 Shino Glazes (1401-1412) for cone 4/6 electric
1420's Ash Glazes c4/6
1460 Semi-transparent / Celedons c4/6