Prior to 1964, the international classification of natural rubber grades was based on the appearance evaluation. At that time, natural rubber was divided into 8 varieties with a total of 35 grades. In the early 1960s, the world’s synthetic rubber developed rapidly and began to exceed natural rubber in annual production. In order to cope with the fierce competition from synthetic rubber, the natural rubber planting industry has also developed a new technical grading principle while developing new varieties. The concept of “standard natural rubber” has been proposed, in addition to retaining the original individual appearance evaluation indicators. Turn to technical grading and develop corresponding assessment indicators. As a major natural rubber producer, Malaysia attaches great importance to this, and with the support of the Natural Rubber Production Research Institute (NRPRA), it is engaged in preparatory work in this area and proposes relevant plans to the International Standardization Association. Since 1964, ISO has agreed This serves as the basis for future international standards. After more than ten years of revision and supplement, it finally passed the “Natural Rubber Quality and Packaging Standard J” in 1979 to become a globally recognized unified ISO standardization document. Since then, more and more natural rubber producers and consumers have produced and adopted Standard natural rubber. The producing countries include Malaysia, Indonesia, Sri Lanka, India, Vietnam, Singapore, Thailand and so on.