Carbon black is composed of fine particles consisting mainly of carbon. Various features of carbon black are controlled in production by partially combusting oil or gases. Carbon black is widely used in various applications from black coloring pigment of newspaper inks to electric conductive agent of high-technology materials. Carbon black, any of a group of intensely black, finely divided forms of amorphous carbon, usually obtained as soot from partial combustion of hydrocarbons, used principally as reinforcing agents in automobile tires and other rubber products but also as extremely black pigments of high hiding power in printing ink, paint, and carbon paper. Carbon black is also used in protective coatings, plastics, and resistors for electronic circuits. As reinforcing filler it greatly increases resistance to wear and abrasion. Carbon black particles are usually spherical in shape and less regularly crystalline than graphite. Among the most finely divided materials known, carbon blacks vary widely in particle size depending on the process by which they are made.
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