Digitalfire Ceramic Glossary



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High Temperature Glaze


In functional ceramics this term generally refers to glazes that mature at cone 8 and higher. At these temperatures natural minerals like feldspar, calcium carbonate, etc can be compounded to create glazes that will melt well without the need for powerful (and troublesome fluxes) like zinc oxide, boron or lead. Materials like Albany slip will melt unassisted to produce beautiful glossy glazes. In addition, high temperatures mean that less high expansion fluxes are needed and so it is much easier to create glazes that do not craze.

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By Tony Hansen




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