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animal black[′an·ə·məl ‚blak]
Finely divided carbon made by calcination of animal bones or ivory; used for pigments, decolorizers, and purifying agents; varieties include bone black and ivory black.
A black pigment made by charring of animal bones; sometimes used in paints, although carbon black generally is preferred for tinting strength and blackness. Available in three grades: boneblack, drop black, and ivory black.