本文件规定了测定金属基材上有机涂层与另一种用作参考（通常称为参考）的仪器色差（CIELAB）和同色异谱（取决于光源）的程序。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies procedures for determining the instrumental colour difference (CIELAB) of an organic coating on a metallic substrate compared to another one used as a reference (usually called reference) and the metamerism depending on the illuminant.All current amendments available at time of purchase are included with the purchase of this document.