bone black
Noun: A black pigment or substance produced by charring animal bones in the absence of air, resulting in a material rich in carbon and calcium phosphate. It is used as a coloring agent and filter medium.
"Bone black" is used as a mass noun. It refers to the specific material itself, not the process of making it. It is commonly used in contexts involving art, manufacturing, and industrial processes. - It is used as a pigment in painting, printing inks, and ceramics. - It is used as a decolorizing filter in sugar refining and other industries.
- The artist mixed bone black with linseed oil to create a deep, rich black paint.
- The sugar was purified by filtering the syrup through bone black to remove colored impurities.
- Bone black has been a traditional pigment since prehistoric times.
- Technical/Industrial Context: In technical specifications, "bone black" may be distinguished from similar pigments like "ivory black" (historically made from charred ivory) or "vine black" (made from charred plant material). Its specific properties, such as adsorption capacity, are relevant in filtration applications.
- Historical Context: The term is used when discussing historical art techniques and materials.
- Bone char: A very similar or synonymous term, often used interchangeably in industrial contexts, particularly for its use in filtration and adsorption.
- Animal black: A broader category of black pigments made by charring animal bones or ivory.
- Drop black: A prepared paint form of bone black, often mixed into a paste with water or oil.
- Bone char
- Animal charcoal (though this can sometimes refer to a less pure form)
The term specifically denotes the carbonized bone product. It does not refer to the color of a living bone or to any other black object. Its defining characteristic is its origin (animal bones) and its manufacturing process (charring).
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black substance containing char in the form of carbonized bone; used as a black pigment
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