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AATCC Gray Scale - Color Change
- Gray Scale for Color Change - Colorfastness to Wash, Light, Gas, Ozone
- DEVICE / CHART by American Association of Textile Chemists and Colorists,
- Publisher: AATCC
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This scale is used in visual evaluation of the changes in color of textiles resulting from colorfastness tests. The grades of the scale steps and the total color differences and tolerances are determined by the CIELAB formula. To be used with EP1-1992.