介绍了在色牢度试验中测定纺织品颜色变化的灰度及其使用。电子秤的精确比色规范作为永久记录，可与新制备的工作标准和可能已更改的标准进行比较。基本刻度（5步）由两对无光泽的灰色色片（或灰色布料样本）组成。此外，一个扩展的音阶包括四个半音阶和九个音阶。

Describes the grey scale for determining changes in colour of textiles in colour fastness tests, and its use. A precise colorimetric specification of the scale is given as a permanent record against which newly prepared working standards and standards that may have changed can be compared. The essential scale (5 steps) consists of pairs of non-glossy grey colour chips (or swatches of grey cloth). In addition, an augmented scale includes four half-steps and, thus, 9 steps.