该标尺用于色牢度测试，用于评估未染色纺织品的染色情况。它有成对的白色和灰色色片，每个色片代表与染色等级相应的颜色或对比度差异。与EP2-1996一起使用。

This scale is used in colorfastness tests for evaluating staining on undyed textiles. It has pairs of white & gray color chips each representing a difference in color or contrast corresponding to a numerical grade for staining. To be used with EP2-1996.