How to test the color fastness of textiles
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Textile Color Fastness Flame Retardant Fabric Fluorescent Fabric
1. Color fastness to washing
The sample is sewn together with the standard backing fabric, washed, cleaned and dried, and washed under appropriate temperature, alkalinity, bleaching and friction conditions, so that it can be washed in a short time Get test results within. The friction between them is accomplished through the tumbling and impact of a small liquor ratio and an appropriate number of stainless steel beads. Gray cards are used to grade and the test results are obtained. Different testing methods have different temperature, alkalinity, bleaching and friction conditions and sample sizes. The specific selection should be based on the testing standards and customer requirements.
Generally, colors with poor color fastness to washing include emerald blue, brilliant blue, black red, navy blue, etc.
2. Dry cleaning color fastness
The color fastness is the same as washing, except that washing is changed to dry cleaning.
3. Color fastness to rubbing
Put the sample on the rubbing fastness tester and rub it with a standard rubbing white cloth under a certain pressure A certain number of times, each group of samples needs to be tested for dry rubbing color fastness and wet rubbing color fastness. Use a gray card to rate the color stained on a standard rubbing white cloth, and the resulting grade is the measured color fastness to rubbing. Rubbing color fastness requires two tests, dry rubbing and wet rubbing, and all colors on the sample must be rubbed.
4. Color fastness to sunlight
Textiles are often exposed to light during use, and light can destroy dyes causing the well-known "line-height: 1.5em;”> “Fading” causes colored textiles to change color, generally becoming lighter or darker, and some may also change color. Therefore, it is necessary to test the color fastness. The color fastness test to sunlight is to test the sample with different fastness levels. The blue wool standard cloth is placed together under specified conditions for sunlight exposure. The sample is compared with the blue wool cloth to evaluate the light fastness. The higher the grade of the blue wool standard cloth, the more light fast it is.
5. Color fastness to perspiration
Sew the sample and the standard lining fabric together, put them in sweat solution, and then clamp them Use a perspiration color fastness tester, put it in an oven at a constant temperature, and then dry it. Use a gray card to rate it and get the test results. Different testing methods have different sweat liquid ratios, different sample sizes, and different testing temperatures and times.
6. Water stain color fastness
Treat the sample with water and test as above.
Chlorine bleaching color fastness: After washing the fabric in chlorine bleach under certain conditions, the degree of color change is evaluated. This is the chlorine bleaching color fastness. Spend.
7. Non-chlorine bleaching fastness
After washing the fabric under washing conditions with non-chlorine bleach, evaluate the degree of color change , this is the non-chlorine bleaching fastness.
8. Press color fastness
After covering the dry sample with cotton lining fabric, place it in a heating device with specified temperature and pressure. After being pressed for a certain period of time, the gray sample card is used to evaluate the discoloration of the sample and the staining of the backing fabric. The color fastness of hot pressing includes dry pressing, tidal pressing and wet pressing. The specific test method should be selected according to different customer requirements and testing standards.
：Flame retardant fabric
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