Hydrocarbons in the strict control the process conditions in qi incomplete combustion in black or pyrolysis powder material. The main composition is the element carbon, and with a small amount of oxygen, hydrogen and sulfur, etc. Carbon black particles, particle size between the approximate spherical close between 10 to 500 m. Many particles often melt "or a 3 d together key branch shape or fibrous aggregates. In the rubber processing, through the mixed refine join in rubber reinforcing agent (see reinforced material) and packing. Carbon black is the oldest one of industrial products.