GB/T 3780.18 - 2007 focuses on the identification of carbon black in natural rubber (NR). This standard provides a standardized method for the evaluation of the bonding performance of carbon black and natural rubber, detailing the whole process from sample preparation, mixing operation to performance testing. Through standardized identification, the impact of carbon black on the vulcanization characteristics, physical and Mechanical Properties of natural rubber can be effectively judged. This provides a basis for Rubber manufacturers to screen suitable carbon black and optimize formulations, help improve the mass of natural Rubber, and promote the rational application and industry development of carbon black in the field of natural rubber.