What kind of dyes are dyeing

Printing and dyeing is a comprehensive processing process of textiles. For example, adding patterns, patterns, changing the color of textiles, and related pre -processing processes are added to textiles. There are eight different types of dye dye dyeing methods in printing and dyeing. Let's continue to look down on how many methods are?

Direct dye dyeing

Direct dyes contain water -soluble groups in the molecular structure, so they can generally dissolve in water. There are also a few dyes that need to add some pure alkali to help dissolve. He can directly dye cotton, hemp, silk, hair, and adhesive fiber without relying on other auxiliary agents, so it is called direct dye. The direct dye chromatography, bright color, low price, simple dyeing method, and uniform color, but its water -resistant coloring accuracy is poor, and the daily sunshine color accuracy is poor. Except for light, it is generally performed.

Reactive dye dyeing

The Reactive dye is a water -soluble dye, and the molecule contains one or more active group (also known as the reactive group). Under certain conditions, it can The combination of chemistry occurs, so active dyes are also called reactive dyes.

Vat dye dyeing

Vat dye is insoluble in water. When dyeing, it must be restored to the alkaline restore solution into a hidden color sodium salt before the dyeing fiber can be used. And fixed on the fiber.

The reducing dye chromatography is relatively complete and bright in color. It is a dye with excellent performance in dyes. Especially the target of sun resistance and washing resistance is not enough to be more than other dyes, but the price is more expensive, the red varieties are less, the dye is thick, and the dyeing color is thick. When the frictional color has a poor degree of friction, some yellow and orange dyes have light -sensitive brittle loss, so they are used to be limited.

Sulphur dye dyeing

Sulphur dyes contain sulfur, which cannot be directly dissolved in water, but it can be dissolved in sulfide, so it is called vulcanized dye. Summary dye manufacturing, low price, simple dyeing process, convenient color combination, and good dyeing fastness, but chromatography is not complete, mainly blue and black, the color is not bright, and it has brittle damage to fiber.

Acid dye dyeing

Acid dye molecules contain acid groups such as sulfate and hydroxyl, which are easily soluble in water and ionize dye anion in the aqueous solution. The acid dye is bright in color, the chromatography is complete, the dyeing technology is simple, and it is easy to combat color.

Disperse dye dyeing

Disperse dyes are non -ion -type dyes with small molecules, simple structure, and non -water -soluble groups, so it is difficult to dissolve in water. When dyeing, it needs to be used to evenly disperse the dye in a small granular state. In the liquid, it is called decentralized dyes. Disperse dye chromatography is complete, with a variety of varieties, good covering performance, and widely used. It is especially suitable for dyeing of polyester, acetaceous fiber, nylon, etc.

Cationic dye dyeing

Cationic dye is developed on the basis of the original alkaline dye. It is a very strong water -soluble dye. In the solution, it can ionize pigmentation and simple anion.