Carbon black, also known as carbon black, is an amorphous carbon. Light, loose and very fine black powder with a very large surface area ranging from 10~3000m2/g. It is a carbonaceous material (coal, natural gas, heavy oil, fuel oil, etc.) that undergoes incomplete combustion or thermal decomposition under insufficient air conditions. And the product. The proportion is 1.8-2.1. 　　 The one made from natural gas is called "gas black", the one made from oil is called "lamp black", and the one made from acetylene is called "acetylene black".