Natural rubber is made from latex, and some of the non rubber components contained in latex are left in solid natural rubber. In general, natural rubber contains 92% - 95% rubber hydrocarbons, while non rubber hydrocarbons account for 5% - 8%. Due to different preparation methods, different origins and even different rubber picking seasons, the proportions of these ingredients may vary, but they are basically within the range. Protein can promote the vulcanization of rubber and delay aging. O...