CALCIUM BORATE
ca: BORAT DE CALCI
es: BORATO DE CALCIO (Boro-calcita)
Calcium Borate is an insoluble form of boron a natural frit. Used as a flux in all types of glaze, it also reduces crazing tendencies. It develops opalescence typical of boron compounds and in large quantities a broken mottled surface. A suitable raku glaze.
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Calcium Borate (Ca3(BO3)2) is an insoluble form of boron, a natural frit, used as a flux in all types of glazes, it reduces crazing. It is a bluish white crystal with a very defined structure and can be prepared by reacting calcium with boric acid. The resulting precipitate is calcium borate.
Link: Wikipedia/Calcium-borate.
