The 8 Methods to Improve the Fastness to Wet Rubbing
I. The choose of dye There is a great variety of reactive dye with different quality level. So the choose of qualified dye becomes important. 1. The choose of bi-functional reactive dyes and multi-functional reactive dyes. S-triazine reactive dye react with fiber and produce ester bond, whose acid-resisting ability is bad. Vinyl sulfones dye react with fiber and produce ether bond, whose alkalic performance is bad. So we choose bi=functional reactive dyes, whose acid-resistance and alkali-resistance ability is good. 2. Choose the dye with proper substantivity If the substantivity of reactive dye is too high, it diffusion ability is bad. The dye will gather on the fabric surface and not extend to the inner of the fiber. The unfixed dye is more than expected, and difficult to wash. If the substantivity is too low, if will influence the degree of fixation. So the substantivity should be medium. And we can refer to the manufactures data to choose. 3. Choose...