AATCC EP 2 Gray Scale for Staining

Scope

AATCC EP 2 Gray Scale for Staining procedure describes the use of the Gray Scale for evaluating staining of textiles resulting from colorfastness tests.  A precise colorimetric specification of the differences between the reference and the 9-Step Scale is given as a permanent record against which newly prepared Gray Scales, and old Scales that may have been changed, can be compared.

Principle

The result of staining from a colorfastness test is rated by visually comparing the difference in color or the contrast between the stained and unstained specimens with the differences represented by the Scale.  The colorfastness grade is equal to the Gray Scale step which is judged to have the same color or contrast difference.

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