Vat Violet Dyes
VAT dye refers to the reduction under alkaline conditions to color the fiber, and then by oxidation, on the fiber to restore the original insoluble pigment, used for dyeing cellulose fiber; The insoluble VAT pigment is made into sulfate sodium salt and changed into soluble VAT pigment, which is mainly used in cotton printing.
It is insoluble in water, dyeing to reduce solution in the alkaline strong reducing solution to leucotroph sodium salt can be infected with fiber
Dip dyeing
Vat dyes are mainly used for dip dyeing of cotton fabrics. According to the different processing amount, we can choose bobbin dyeing machine or warp dyeing machine. In recent years, in order to adapt to the high quality of cotton knitwear, we also choose liquid flow dyeing machine. In addition, for the requirements of small batch and rapid processing, garment dyeing will increase.
Continuous staining
Continuous dyeing by reduction dye suspension rolling process is suitable for mass production, with the majority of fabrics such as overalls, coats and bedding; while roll dyeing is suitable for small batch processing, especially for wide fabrics and thick fabrics such as tents.
printing
The most common way to print with vat is to use the one-phase printing of potassium carbonate and anti migration agent. In Europe, the United States and Japan, a kind of high-grade printing textiles is to use reactive dyes for ground dyeing and vat dyes for discharge dyeing. In addition, the urs method for mass processing is two-phase printing, which is most suitable for direct printing of covers and covers.
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