The main composition is the element carbon, and contains a small amount of oxygen, hydrogen and sulfur, etc.Carbon black approximately spherical particle, particle size between *0 to **0 μ m rooms. Many particles often melt "or get together form 3 d key branch shape or fibrous aggregates. In the rubber processing, through the mixed refine to join in the rubber reinforcing agent (see reinforced material) and packing. Carbon black is the oldest one of industrial products.

Mainly used as the rubber reinforcing agent and packing, the consumption of about half of the consumption of rubber, rubber carbon black carbon black with accounts for *4% of the total, of which about *0% used in tire manufacturing. In addition, also used for printing ink, paint and plastic colorants and plastic products BingBiJi of ultraviolet light. In many other products, such as electrode, the dry batteries, resistors, explosives, cosmetics and polishing compound, and it is also the important additives.