What is bone black ?
Sci/Tech Thursday, July 29th, 2010
The Columbia Encyclopedia: “bone black” is solid black material, largely carbon, produced by heating animal bones to high temperatures in the absence of air so as to drive off volatile substances. Finely divided bone black is useful as a pigment; bone char, a similar material, is an important source of activated charcoal for use in refining and decolorizing sugar.
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