Analysis of factors affecting the light fastness of flame retardant fabrics
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Factors affecting the light fastness of flame retardant fabrics
(1) It is related to the influence of external conditions: the level of air moisture content and the level of temperature also have a great influence on the light fastness. Generally, the light fastness is lower when the moisture content is high. For example: Vanlamin blue is more likely to turn red and fade in the south than in the north. (2) It is related to the dye concentration: the light fastness of the same dye on the same type of fiber changes with the change of dye concentration. Generally, the fastness of low concentration is worse than that of high concentration. This is the case with azo dyes. The performance is particularly obvious. (3) It is related to the type of fiber: the sunlight fastness of the same dye on different fibers is also very different. For example, indigo is light fast on wool but has very low light fastness on cellulose. Another example: The sunlight fastness of Vanlamin Blue Salt B on viscose is much higher than that on cotton. (4) Related to additives: For example: There are many additives that can effectively improve the light fastness. (5) It is related to the dye structure: Generally speaking, the sunlight fastness of anthraquinone dyes, phthalocyanine dyes, sulfide sulfide blue and metal complex dyes in the sulfurization process is relatively good. The light fastness of most insoluble azo dyes is also relatively high, while even aniline-type azo dyes have low light fastness, and triarylmethane is not light fast.
：Textile
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