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Noun
carbon black
lampblack
soot
smut
crock
Definition: a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink
Definition: A fine black powder of amorphous carbon manufactured by the incomplete combustion of natural gas or oil, and used as a pigment in the manufacture of ink and paint. Used as a filler in rubber like polymers and rubber. It helps the polymers resist deterioration by ultraviolet rays.