①Direct dyes - dyeing cotton, linen, wool, silk and viscose (room temperature dyeing)
Features: The most complete chromatogram, the lowest price, the worst fastness, and the simplest method.
Formaldehyde as accelerator
Fabrics that have been dyed with direct dyes generally require a color reinforcement to stabilize the color fastness.
②Reactive dyes
The reactive groups in dyes combine with reactive groups in cotton, linen, silk, wool and viscose.
Features: bright color, good levelness, good fastness, but expensive.
③Disperse dyes
Special dyes for polyester
The molecules of the dye are as small as possible and can penetrate in, and at the same time, high temperature and high pressure are used to promote the penetration of the dye. Therefore, the color fastness is high.
④Cationic dyes
A special dye for acrylic fiber, it is negative ion when acrylic fiber is spinning, and it is colored with the cation in the dye.
Add negative ions to B polyester, which can be dyed at room temperature with cationic dyes. It is cationic dyeable polyester yarn.
⑤ Acid dyes
Dyed wool.
