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The Development of Direct Dyes in China

Direct dyes are a kind of dye which can directly stain cellulose fiber in neutral or weak alkaline medium , usually without the use of mordant. Direct dyes are widely used in the dyeing of cotton, viscose, silk and linen, sometimes also used for the dyeing of nylon and wool. Besides,it is heavily used for paper and leather coloring, especially on paper, about 60% of paper dyes are direct dyes.

In recent years, direct dyes developed rapidly in China .In the development of new varieties of direct dyes, take great efforts to the direct dyes, direct light fastener and disable the dye substitutes using in paper dyeing. The development of new varieties of direct dyes have caused great concern in domestic .

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