Bone Ash (Di-Calcium Phosphate)

Di-Calcium Phosphate

An important source of calcium phosphate made from calcined cattle bones. Real bone ash is chemically inert and free of organic matters. Calcium acts as a flux, and phosphorous as a glass former.

Commonly used in commercial porcelains known as bone china, where it lowers the maturing temperature and adds translucency. Used in Iron red glazes where it brightens the color, and is used to give texture in low fire glazes.