Technically Specified Rubber (TSR), often referred to as Block Rubber, is a versatile form of natural rubber crafted from both field latex and field coagulum, or a blend of these materials. Each grade of Block Rubber is meticulously classified based on technical parameters such as dirt content, ash, nitrogen, volatile matter, and key properties like Wallace Plasticity (PO) and Plasticity Retention Index (PRI). Renowned for its excellent processing characteristics and superior physical properties, Block Rubber serves a wide range of applications. Some well-known types include ISNR (Indian Standard Natural Rubber), Standard Thai Rubber, ISNR 10, and ISNR 20, each offering its unique specifications to meet diverse industrial needs.