1.1 ,This terminology is a compilation of abbreviations for accelerators, vulcanizing agents, activators, antidegradants, plasticizers, softeners, processing aids, blowing agents, retarders, isocyanates, peroxides, and antireversion agents used in the compounding of rubber products. Abbreviations for rubbers are listed in Practice D1418 and a numbering system for various grades of carbon blacks is described in Classification D1765.