Uses
- Bone char is used to remove fluoride from water and to filter aquarium water.
- It is often used in the sugar refining industry for decolorizing (a process patented by Louis Constant in 1812).
- It is used to refine crude oil in the production of petroleum jelly.
- Bone char is also used as a black pigment. It is sometimes used for artist's paint, printmaking, calligraphic and drawing inks as well as other artistic applications because of its deepness. Ivory black is an artists' pigment formerly made by grinding charred ivory in oil. Today it is considered a synonym for bone char. Actual ivory is no longer used because of the expense and because animals who are natural sources of ivory are subject to international control as endangered species.
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