标准摘要
[中文适用范围]： 1 范围 本文件规定了一种测定透明、半透明或不透明塑料的黄变指数及其变化的仪器方法。 注：黄变指数的变化常用于评估环境因素（如热、紫外光暴露等）对颜色稳定性的影响。 [外文原描述]： This document specifies an instrumental method for determining the yellowness index and change in yellowness index on clear, translucent, or opaque plastics. NOTE Change in yellowness index is often used to evaluate the effect of environment, e.g. heat, UV exposure, etc., on colour stability.
英文名称Plastics — Determination of yellowness index and change in yellowness index