Therefore, in recent years, various new fiber and multi-component fiber dyeing and finishing processes have been studied, and processes such as two-color and flashing have appeared. However, different components have damage, yellowing and shrinkage in the pretreatment. The dyes are stained with each other on the components, the color fastness is reduced, the heterochromatic hue is limited, and it is difficult to dye the same color, and the vividness is decreased. This requires the reasonable selection of fiber combination and organization structure when formulating the process, and rationally formulate the dyeing and finishing process and process conditions according to the characteristics of each component.
In recent years, there have been numerous finishing methods, such as frost, enzyme washing, tie dyeing, sand blasting, ginning and coating, which enrich the appearance of the fabric. The market for functional textiles is also growing, such as waterproof, oil-proof, breathable, easy to decontaminate, anti-wrinkle, non-scalable, antibacterial, health care, flame retardant, antistatic, anti-UV. These finishing methods can change the dyeing and finishing process of other processes. For example, in a corduroy fabric to be post-washed, the dead cotton on the cloth surface can be covered as much as possible, without re-cooking before pre-treatment, or after squeezing after dyeing; for post-treatment such as frying frost, sand blasting, etc. Fabrics are best dyed with sulphur dyes; fabrics that are free of scalding should be kept as strong as possible in the front process; hydrophilic softeners should be used for moisture wicking fabrics.