Bone black

Bone black, also known as animal charcoal, is a form of charcoal specifically derived from bones. It is a dark, porous material that is used in a variety of applications, including art, filtration, and agriculture.

History

The use of bone black dates back to prehistoric times, when early humans used it as a pigment for cave paintings. In the Middle Ages, it was used by artists for its rich, deep black color. In the 19th century, bone black became a popular ingredient in the production of ink and paint.

Production

Bone black is produced by the pyrolysis of animal bones. The bones are heated in a closed container without access to oxygen, causing them to break down into a black, carbon-rich material. This process is similar to the production of other forms of charcoal.

Uses

Bone black is used in a variety of applications. In art, it is prized for its deep, rich black color and is used as a pigment in paints, inks, and pastels. In agriculture, it is used as a soil amendment to improve the fertility of the soil. In filtration, it is used to remove impurities from liquids and gases due to its high porosity and adsorption capacity.

Health and safety

While bone black is generally considered safe for use in art and agriculture, it can pose health risks if inhaled or ingested in large quantities. It is recommended to use appropriate safety equipment when handling bone black.

See also

• Charcoal
• Pigment
• Soil amendment
• Filtration