Soot carbon is a filling agent for rubber that can improve its wear resistance. It is mainly produced by high temperature CRACKing that use coal tar as the feedstock.

• 炭黑是橡胶里的一种填充剂，可以增加橡胶的耐磨性等，它主要是以煤焦油为原料在高温下裂解而成的。