First, the appearance index: randomly sampled 2 meters of the sample, in the place where there is light, visual inspection of the surface of the cloth with broken wire, hard block and other unqualified defects. At the same time, pay attention to whether the light transmission performance of the cloth surface is consistent (this is an important and simple method to judge the uniformity of the cloth surface). Then spread on a flat ground, evenly distributed products, the fabric should be no ups and downs, and if you are, you are in trouble when processing the pieces.
Second, the physical indicators of the cloth: observe whether the cloth surface is shiny. There are no fibers floating on the surface, if there is no dull or a lot of float, it is mostly produced by returning materials. Tear a piece of cloth, burn it completely with fire, observe the burning residue, good product, less residue and flat, the secondary material is produced, the residue has a lot of tiny particles of dust. If time permits, you can take a square meter in the sun, "Li Gui" is unable to withstand the ultraviolet rays of the sun, there will be obvious changes after 7 days, with a hand to tear, it is as easy to tear as paper .
