lampblack

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Fine soot collected from incompletely burned carbonaceous materials, used as a pigment and in matches, explosives, lubricants, and fertilizers. Also called blacking.

Century Dictionary and Cyclopedia

1. n. A fine black pigment consisting of particles of carbon, pure or almost pure, used for making paints and ink. It reflects only about two per cent of the incident light. It was formerly made by burning crude oils with the least supply of air possible for combustion, in order to produce a smoky flame, the soot being collected in a receptacle called a lampblack-furnace, and was prepared for use by being heated to redness in iron boxes. It is now generally made by allowing gas-flames to impinge on cylinders of iron chilled by a stream of cold water flowing through them, The lampblack collects on the cold surfaces, and is removed and collected by machinery. This form of lampblack is known as carbonblack or gas-black.
2. To treat with lampblack; coat with lampblack.

Wiktionary

1. n. An amorphous form of carbon made from incompletely burned organic matter; used to make pigments and inks.

GNU Webster's 1913

1. n. The fine impalpable soot obtained from the smoke of carbonaceous substances which have been only partly burnt, as in the flame of a smoking lamp. It consists of finely divided carbon, with sometimes a very small proportion of various impurities. It is used as an ingredient of printers' ink, and various black pigments and cements.

WordNet 3.0

1. n. a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink