•The secret to cool bodies and glazes is a lot of testing.
•The secret to know what to test is material and chemistry knowledge.
•The secret to learning from testing is documentation.
•The place to test, do the chemistry and document is an account at https://insight-live.com
•The place to get the knowledge is https://digitalfire.com
Tridymite and cristobalite phases of silica. Ordinary kiln wash made from a mixture of kaolin and quartz can produce significant amounts of very fine grained cristobalite. This poses a greater health risk than ordinary quartz.
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Cristobalite is a crystalline form of silica (SiO2). Silica has the rather amazing ability to exist in different crystalline forms (called polymorphs) each of which has subforms (e.g. alpha, beta). Each form has different physical properties. Quartz in the preferred most stable form, the one found i...
By Tony Hansen