What are the requirements for the color fastness of composite fabrics
What are the requirements for the color fastness of composite fabrics? The color fastness of composite fabrics is best dyed with reactive dyes. If ordinary dyes are used, the color fastness of composite fabrics may not meet export standards. The color fastness of dark colors is generally 0.5-1.0 levels worse than that of light colors. about.
The color fastness of composite fabrics includes: color fastness of composite fabrics to washing, color fastness of composite fabrics to acid perspiration, color fastness of composite fabrics to alkaline perspiration, color fastness to water stains of composite fabrics, and color fastness to dry rubbing of composite fabrics. , color fastness to wet rubbing of composite fabrics, color fastness to light of composite fabrics.
Testing methods for color fastness of composite fabrics:
1. Different color fastnesses require different testing methods. The testing standards vary from customer to customer. (For example, 40 degrees water temperature, machine wash for 30 minutes.) For example, soaping fastness is also divided into two sub-items: color fastness and multi-fiber color fastness.
2. Color fastness and discoloration of composite fabrics: When testing, first cut a sample of specified size, place it at a specified temperature (this is based on the customer and the washing temperature requirements), and wash it in a specified amount of water for a certain period of time (this is also the same as Customer requirements related). How much does the color change after taking it out to dry? Evaluate and count based on the degree of change.
3. Staining of composite fabrics: Cut fabric swatches of specified sizes, sew them together with white acrylic/cotton/wool/nylon/polyester/viscose fabrics and wash at specified temperatures for specified times. After taking it out to dry, check the degree of staining of the original color on the acrylic/cotton/wool/nylon/polyester/viscose fabric to evaluate the accuracy.
4. Rubbing fastness is divided into dry rubbing/wet rubbing. Dry rubbing is to put the fabric directly on the white cloth and rub it repeatedly, and then evaluate and count the color depth left on the white cloth.
5. Wet grinding is to rub a wet cloth on a white cloth and evaluate and count.
Keywords:
Composite fabric Color fastness of composite fabric
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