|Monthly Tech-Tip |
This glaze is Spectrum 700 fired at cone 04 on Plainsman M370 medium temperature porcelain. The clay was bisque fired at cone 04 also. It is more crystal clear and higher gloss than would be possible to attain at cone 6. If better ware strength is needed you can bisque fire pieces at any cone desired, but keep in mind that the more dense the body the longer it will take to dry each coat of glaze. If a white crackle is needed Spectrum #701 can be used.
Crackle glazes are used on decorative ceramic ware. They have a crack pattern that is a product of thermal expansion mismatch between body and glaze.