mauve cotton fabric

Silk is lightweight but durable. It’s soft, shiny appearance cannot be beat. However, it is expensive and yellows with age. It also requires special care when cleaning. Wool is best known for its moisture wicking properties. Wool acts as a natural insulator for both cool and warm environments. It is also anti-microbial which allows it to keep odors at bay. However, some wool may be coarse and scratchy.

3. Staining of washing liquid
For the rating of staining of washing liquid after soap washing test (refer to FZ/T 73020-2019), the rating should be completed within 15 minutes after the test. After removing impurities from the soap liquid, pour it into a colorimetric tube, use the unwashed soap liquid with the same test temperature as the reference sample, and use the staining gray card to evaluate the staining degree of the washing liquid under D65 light source and white cardboard as the background.