Andy Clift: /* Uses in Ceramics */

<div>'''Bone ash''' is the white, powdery ash left from the burning ([[calcination]]) of [[bone]]s. It is primarily composed of [[calcium phosphate]]. It is commonly used in [[fertilizer]]s, [[polishing]] compounds, and in making [[ceramic]]s (such as [[bone china]]). It also has historical uses in the manufacture of [[baking powder]]s and assay [[cupel]]s.

Although [[chemical synthesis|synthetic]] alternatives have been produced (synthetic [[tricalcium phosphate|tri-]] or [[dicalcium phosphate]]s), the majority of bone china is still made using natural bone ash{{Fact|date=February 2007}}. Synthetic bone ash has also found use as a mold release agent for the casting of non-ferrous metals such as [[copper]].



==Uses in Ceramics==
:'''Clay'''


:'''Glaze'''test

==See also==

* [[Bone char]]

==References==
*{{MW 1935|date=August 2008}}

[[Category:Inorganic compounds]]
[[Category:Bone products|Ash]]

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