Manufacturers have problems in the production, in the color of the time without professional equipment to complete, just a haphazard thing, so when we buy to see the product color fastness grade, and then go to choose, in general, manufacturers of products color fastness will be in the 3.5 level or so, this is the general standard, in this color fastness on top of the more solid, can be used at high temperatures will not fade. The color fastness above this is more solid and can be used under high temperature without fading. Generally speaking, the color fastness of the Velcro tape in the industry, we will call it color fastness, that is, the higher the color fastness, then it will not appear the case of color loss. However, generally by the Velcro tape manufacturers produced by the Velcro tape, its color fastness will be around 3.5 + level, is in line with the requirements of the Velcro tape color fastness. At the same time, 3.5 + grade of Velcro can not only be used at room temperature, even in high temperature environment can also be used normally. However, it is important to note that the Velcro is not in contact with chemicals and chemical reagents, because in the case of chemical reaction, whether the Velcro appears to lose color. Then if the normal use of Velcro is not the case of color loss. Seeing here, I believe you have understood that the key of Velcro will not lose color lies in how to use it correctly. In addition, when using Velcro, we must keep the surface clean, and pay attention to the preservation, do not put it and corrosive substances together, accidentally stained with water in a timely manner, otherwise it will affect the normal use of Velcro, but also accelerate the degradation of its chromaticity. It is best to keep the Velcro in a clean, moisture-proof, away from the fire place.