1. The hygroscopicity of disposable compressed cotton towels:

　　That is to say, if you put the disposable compressed cotton towel here, we will drop it on it casually, and the water will immediately seep into the towel, without any slippage or spread. What about a bad disposable compressed cotton towel, it forms water droplets, does not seep, and the droplets can't hang, it slides down quickly, we say this is a bad towel, because it is too soft, no Moisture.

　　2. Disposable compressed cotton towel to see if the color of the towel has faded:

　　Pure cotton towels are generally dyed with reactive dyes, and the dye molecules are covalently bonded to the cellulose molecules, so that the dyes are fixed on the fibers. During the reaction process, some dyes are combined with the fibers, and some dyes are hydrolyzed and adsorbed on the surface of the fibers, but they are easy to fall off without covalent bonding.

　　When dyeing dark-colored disposable compressed cotton towels, a large amount of hydrolyzed dyes is adsorbed on the fibers, which is difficult to wash, so there will be decolorization in the first washing, which is unavoidable. If the light-colored disposable compressed cotton towel loses a lot of color in the first washing or the dark towel still loses color after repeated washing, it is caused by the unqualified dye or the inaccurate dyeing process, and it is an unqualified product.