•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
A transparent crystal form of the mineral gypsum. This can occur in clays and is the cause of efflorescence.
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A term describing the whitish or brownish scum (depending on iron content) left on the surface of a fired clay body (most often red earthenware or raw stoneware and fireclays). Many clays contain soluble sulphates that are left on the surface after having been left there by water that has subsequent...
- (Minerals - Related)
Gypsum, Calcium sulphate
CaSO4 2H2O is the crystalline mineral from which plaster is made. It is not practical as a source of CaO in glazes because its decomposition produces SO3 which is dangerous to health and it is destruc...
Selenite at Wikipedia
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By Tony Hansen