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This type of reactive dye possesses VS (Vinyl Sulphone) as its reactive group. These dyes react chemically with the hydroxyl group of cellulose and form firm, covalent linkages in the presence of Alkali.
This type of reactive dyes has low reactivity and substantivity. As they have low reactivity, these dyes require more severe conditions for fixation of cellulosic materials.
Reactive Cold Brand Dyes are are used in the process of dyeing and printing of various types of cellulosic fibers like Viscose, Polynosic rayons, Cotton, Linen,etc.