Direct Dyes

Direct dyes are a class of hot water dyes for use on cellulose fibers, such as cotton. It is one of the two types of dyes that are mixed in 'all purpose dyes' such as Rit, Tintex Hot Water dye, and Dylon Multi-purpose Dye. (The other type in the mixture is an acid dye, which will not stay in any cellulose fiber for long.) Try to find them pure, without the useless (for cotton) and money-wasting acid dyes mixed into the 'all-purpose' dyes.

In most cases, better results will be obtained, often with versatile and easier-to-use cool water methods, if you use fiber reactive dye instead of direct dye. However, there are some cases in which direct dye is preferred.

Direct Dye Black

It is black powder soluble in water(greenish black), soluility: 100g/L (8 celsuis), slightly soluble in ethanol and acetone.

Use: As substitute of Direct Black BN; Mainly used in the dyeing and printing of viscose; Also used in the coloring of leather and paper.

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Direct Dye Red

Direct Red-dye by ozonation in a fixed bed batch bubble column reactor. The conversion percentage for bubble column.enhances our concept that fixed bed batch bubble column reactor is effective in degradation of dyes. The large utilization of synthetic dyes is a matter of environmental concern since some of them are potentially toxic,mutagenic and carcinogenic.

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Direct Dye Yellow

Dyeing and Printing Cotton and Viscose Fabric. Dyeing and Printing Silk,Wool,Vinyon and Nylon Fabric dyeing and Printing Paper Pulp,Etc.

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