According to China's product standards and the actual use of fabric, clothing (ornaments) and home textiles products, color fastness test , generally according to the following methods: 1、 fabric class Test the color fastness to wash the fabric, generally according to its end use to choose the washing method. In the case of unknown use, according to the following methods: ① wire, viscose fiber, wool, nylon fabric, with reference to GB / T392l a 2008A (1), the test temperature is (40 ± 2) ℃. ② cotton, linen, polyester, acrylic fabric, with reference to GB / T3921-2008C (3), the test temperature is (60 ± 2) ℃. ③ new fiber, such as Lyocel fiber, Modal fiber, milk protein fiber and soybean protein fiber, should be based on fiber performance and dyeing process may be, generally use GB / T3921-2008A (1) standard, the test temperature is (40 ± 2) ℃. 2、 clothing (ornaments) class (1) knitted garments knitted casual wear, body underwear, thermal underwear, knitted skirts, infant ...