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Analysis of factors affecting the color fastness of textiles

1) The fastness to sunlight is unqualified. The color of the part exposed to more sunlight becomes lighter or discolored, while the color of the part that is not or less irradiated does not change or changes slightly, resulting in different shades of the original color of the product, and can no longer be used.
2) The color fastness to washing, the color fastness to soaping and the color fastness to dry cleaning are unqualified. High-end silk clothing, wool clothing, and pure cotton clothing are most prone to this problem.
3) The color fastness to rubbing is unqualified. During the use of textiles, because different parts of the product are subjected to different degrees of friction, the degree of discoloration is different. For example, the elbows of tops, sleeves, collars and underarms are the easiest to fade. In addition, the hips and knees of the pants are also easy to fade.
4) The color fastness to perspiration is unqualified. Mainly summer clothes or close-fitting underwear are dipped in sweat and faded when they are worn.

Factors affecting color fastness and improvement methods
Products with poor color fastness fade during wearing, which will affect other clothing worn on the body, or contaminate other clothing when washed with other clothing, affecting appearance and wearing performance; on the other hand, good color fastness is directly related to bad To the health and safety of the human body. Dye molecules and heavy metal ions on products with poor color fastness may be absorbed by the human body through the skin and harm the skin and even harm the health of the body.

The factors that affect the color fastness of textiles are divided into internal factors and external factors. Internal factors refer to the firmness of the combination of dyes and fibers, and external factors refer to the external force applied to the product or the environmental conditions provided by external factors during the use of the product. External factors cannot be controlled, so producers must strive to improve the color fastness of the product itself.

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