Insoluble sulfur products actually refer to a mixture of insoluble sulfur and soluble sulfur (ordinary sulfur). Compared with ordinary sulfur, using insoluble sulfur products as vulcanizing agents in rubber processing can avoid the phenomenon of "frost spraying" in semi-finished rubber products, make the vulcanization of products uniform, and increase the vulcanization speed. However, thermal effects, induction of alkaline substances (especially amines), unreasonable storage time, and the coordination and processing of rubber can all lead to premature reduction of insoluble sulfur to ordinary low molecular soluble sulfur. As the temperature increases, the conversion rate becomes faster. To prevent conversion, small amounts of chlorine, bromine, iodine, sulfur monochloride, and dienes can be added. take α- Sulfur is heated to a high temperature (near boiling point), and when it becomes a black brown viscous liquid, it quickly cools down to polymerize into insoluble sulfur.