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bone black

bone black, 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.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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