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Some webbing for use by infants and young children but also assessment saliva-resistant color fastness. Assessment of color fastness general Visual assessment Gray card standard, under certain lighting and environmental conditions, the human eye contrast gray card and sample to determine the sample as discoloration and white staining level number. Gray card (discoloration and staining) five fastness level, that is, 5, 4, 3, 2, 1. 5 best, 1 worst.

Add half a grade 4 5,3 4,2 3,1 2, so our day-to-day use gray card 5 9 files, color fastness and assessment results as one of the nine levels in each of the two levels. If the webbing products of a particular color fastness up to less than the level of the standard specifies webbing products to be ineligible.