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Bone char (Latin: carbo animalis) is a porous, black, granular material produced by charring animal bones. Its composition varies depending on how it is made; however, it consists mainly of tricalcium phosphate (or hydroxyapatite ) 57–80%, calcium carbonate 6–10% and carbon 7–10%. [ 1 ]
It is known by a variety of names, each of which reflects a traditional method for producing carbon black: Ivory black was traditionally produced by charring ivory or bones (see bone char). Vine black was traditionally produced by charring desiccated grape vines and stems. Lamp black was traditionally produced by collecting soot from oil lamps.
Ivory black, also known as bone char, was originally produced by burning ivory and mixing the resulting charcoal powder with oil. The color is still made today, but ordinary animal bones are substituted for ivory. Mars black is a black pigment made of synthetic iron oxides. It is commonly used in water-colors and oil painting.
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Ivory (3 C, 20 P) Pages in category "Bone products" The following 20 pages are in this category, out of 20 total. ... Bone char; Conservation and restoration of bone ...
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