GB/T 8081-1999 in English

《GB/T 8081-1999天然生胶 标准橡胶规格》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了天然生胶六个等级的最低质量要求和相应的检验方法。本标准适用于我国各级别的天然生胶标准橡胶。

Scope

This standard specifies the minimum quality requirements and corresponding inspection methods for six grades of natural raw rubber. This standard is applicable to all grades of natural rubber standard rubber in my country. Except for constant viscose (CV) and light-colored glue (L), each grade of raw rubber is named after the highest value of its impurity content, while constant viscose and light-colored glue are based on specified characteristics, such as constant The grade of viscose is named after its viscosity stability, while the grade of light-colored glue is named after its light color. The maximum impurity content of constant viscose glue and light color glue is the same as No. 5 glue.