DongHai Rubber Retarders: The Missing Key to Safe Processing Windows A mixer operator judges a batch by familiar signals like color, sheen, and the steady torque on the ram, yet one danger develops invisibly inside the stock, because crosslinking chemistry begins long before any mold receives the compound, and the first faint network forming at high mixer temperatures marks the opening of a countdown that ends in scorched rubber. Scorch time measures the safe...