boneblack
/ˈboʊnˌblæk/
noun
- A black pigment made by burning animal bones in a closed container, used in paints, inks, and as a decolorizing agent.
- Boneblack is still used in some traditional ink recipes for its rich color.
- The factory produced boneblack for use in refining sugar.
- The artist used boneblack to create deep, dark shadows in the portrait.