Advantages of reactive dyes
① Covalent bond between reactive dyes and fibers, in general, this bond will not dissociate, so once reactive dyes are dyed on fibers, they have good color fastness, especially wet fastness .
②Brightness of color and brightness are particularly good;
③ The cost is lower than that of vat dyes;
④ Complete chromatogram.
Disadvantages of reactive dyes
①Poor chlorine resistance and light fastness;
②It is easy to be hydrolyzed in water, the utilization rate is low, and a large amount of colored sewage is produced. In order to meet the needs of the fixation of reactive dyes, an alkali agent needs to be added in the dyeing stage, and the dyes are easily hydrolyzed under alkaline conditions, resulting in a decrease in the utilization rate of the dyes.