boneblack

American  

[bohn-blak] / ˈboʊnˌblæk /

Or bone black

noun

1. a black, carbonaceous substance obtained by calcining bones in closed vessels, used as a black pigment, a decolorizing agent, etc.

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boneblack British  

/ ˈbəʊnˌblæk /

noun

1. a black residue from the destructive distillation of bones, containing about 10 per cent carbon and 80 per cent calcium phosphate, used as a decolorizing agent and pigment

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Etymology

Origin of boneblack

First recorded in 1805–15; bone ( def. ) + black

Example Sentences

While they may improve conditions somewhat, the only solution to such a problem is the use of the boneblack process.

From Project Gutenberg

Animal charcoal or boneblack.—This material is made from bones of animals, by burning them in a kiln built for that purpose.

From Project Gutenberg

The following is commended for the preparation of a black ink or paste for use with stencils:—Boneblack, 1 lb.; molasses, 8 ozs.; sulphuric acid, 4 ozs.; dextrine, 2 ozs.; water sufficient.

From Project Gutenberg

Muriate of potash costs $40 and upwards per ton, sulfate about $48, dissolved boneblack about $24, ground bone about $30, kainit about $13, and nitrate of soda about 2-1/4 cents per pound.

From Project Gutenberg