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what is reactive dyes
Aug 14, 2018

Reactive dyes is a new class of water-soluble dyes that appeared in the 1950s. The reactive dye molecules contain reactive groups that react with hydroxyl groups in cellulose and amino groups in protein fibers. A covalent bond is formed to form a "dye-fiber" compound. Reactive dyes have bright color, good dyeing, simple dyeing method, high color fastness, complete chromatogram and low cost. They are mainly used for dyeing cotton, hemp, viscose, silk, wool and other blended fabrics. And printing.


The reactive dyes are composed of the parent dye, the linking group and the active group, so that they can form a strong covalent bond with the fibers during use, and have a series of characteristics unmatched by other cellulose fiber dyes. The development and use of dyes for the use of dyes in the fiber is prominently manifested in the following four aspects:

(1) Reactive dyes are one of the best alternatives to banned dyes and other types of cellulose dyes such as sulphur dyes, ice dyes and vat dyes.

(2) Reactive dyes can achieve high levels of fastness, especially wet fastness, using an economical dyeing process and simple dyeing operations.

(3) The reactive dye has wide chromatogram, bright color, excellent performance and strong applicability, and its hue and performance are basically compatible with the market requirements for fiber and clothing.

(4) Reactive dyes are suitable for printing and dyeing of new cellulose fiber products such as Lyocell fibers.

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