本文件规定了两种根据标准色标测定天然生胶颜色的方法: -方法A:与标准彩色眼镜颜色匹配； -方法B:使用颜色分光光度计测定颜色。 如有争议，首选方法为方法B。

This document specifies two methods to determine the colour of raw natural rubber according to a standard colour scale: — Method A: colour matching against standard coloured glasses; — Method B: colour determination using colour spectrophotometer. In case of dispute, the preferred method is Method B.