Carbon black, also known as carbon black, is an amorphous carbon. A light, loose, and fine black powder with a very large surface area ranging from 10 to 3000 m2/g. It is a product of incomplete combustion or thermal decomposition of carbonaceous substances (coal, natural gas, heavy oil, fuel oil, etc.) under conditions of insufficient air. Specific gravity 1.8-2.1. Made from natural gas is called "gas black", made from oil is called "lamp black", and made from acetylene is called "acetylene black". In addition, there are "groove black" and "furnace black". According to the performance of carbon black, there are "reinforced carbon black", "conductive carbon black", "wear-resistant carbon black", etc. Can be used as a black dye for manufacturing Chinese ink, ink, paint, etc., and also as a reinforcing agent for rubber.