A kind of amorphous carbon. Light, loose and very fine black powder, specific surface area is very large, ranging from 10-3000m2 / g, is the organic (natural gas, heavy oil, fuel oil, etc.) under conditions of insufficient air by the incomplete combustion or thermal decomposition derived from the product.

Can be used for black dye, for the manufacture of Chinese ink, printing ink, paint, etc., is also used to do the rubber reinforcing agent.