出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/01/12 08:26 UTC 版)
Bone ash is the white, powdery ash left from the burning (calcination) of bones. It is primarily composed of calcium phosphate. It is commonly used in fertilizers, polishing compounds, and in making ceramics (such as bone china). It also has historical uses in the manufacture of baking powders and assay cupels.