- The differences between dyeing and printing are as follows:
① Printing is better than dyeing in covering defects of grey fabric.
② The weft inclination requirement of printed cloth for semi-finished products is particularly stringent.
③ Dyeing and printing may have special requirements for the same type of dyes.
④ The pretreatment requirements of dyeing and printing for semi-finished products are different. (e.g. whiteness, gross effect)
⑤ The dyeing solution does not add or add a small amount of thickening paste, and the printing paste adds more thickening paste.
⑥ When dyeing, the dyes permeate and diffuse sufficiently. When printing, dyes are not easy to diffuse and penetrate. They need to be steamed or baked.
⑦ Dyeing solution, dyes are easy to dissolve, without cosolvent. Printing paste with more cosolvents.
⑧ Dyeing seldom uses two different types of dyes. Different types of dyes are often used in printing.
- The similarities between dyeing and printing are as follows:
① The same kind of fibers, if dyed and printed with the same dye, can have the same dyeing fastness.
② The physical and chemical properties of the chemical additives used are similar.
③ The dyeing and fixing principles of dyes are similar.