Frequently Asked Questions About Color Fastness Of Textiles
Apr 20, 2023
Frequently asked questions about color fastness of textiles:
1. The light fastness is unqualified. During the wearing process of outerwear, the color of the part exposed to more sunlight becomes lighter or discolored (usually the back and shoulders), while the color of the part that is not exposed to or less exposed to sunlight remains unchanged or changes lightly, resulting in a product has different color and cannot be used anymore.
2. The color fastness to washing, the color fastness to soaping and the color fastness to dry cleaning are unqualified. High-grade silk garments, wool garments, and pure cotton garments are 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 color fading is different. For example, the elbows of jackets, sleeves, collars and underarms are prone to fading. Also, the hips and knees of pants are prone to fading.
4. The color fastness to perspiration is unqualified. It is mainly caused by the impregnation of sweat and fading of summer clothes or close-fitting underwear when worn.
Factors affecting color fastness and improvement methods:
Products with poor color fastness will fade during wearing, which will affect other clothes worn on the body, or contaminate other clothes when washed with other clothes, affecting the appearance and wearing performance. On the other hand, good or bad color fastness is directly related to human health and safety. The dye molecules and heavy metal ions on products with poor color fastness may be absorbed by the human body through the skin and endanger the skin and even harm the health of the body.
The factors affecting 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 forces exerted by external factors or the environmental conditions provided by the product during use. External factors cannot be controlled, so producers should strive to improve the color fastness of the product itself.
