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White core indigo dyed cotton yarn without color difference and manufacture method: It dyes cotton first, then spins. As it dyes loose cotton, therefore every cotton fiber gets dyed. After spinning, it has no white core. It solves the problem of low affinity between indigo dye and dyed stuff. In addition, even dyed cotton fiber has color difference, after cotton blending and drawing process etc., it gets even mixing of cotton fiber. After spinning, it reduces color difference of dyed cotton fiber. It enhances the product quality and grade.
Use reduced vat dye and enzymatic method of sulfur dye£¬the invention relates to the material dyeing method. (a) It uses dyeing system processing material with 1 or multiple reduced vat dyes and / or 1 or multiple reduced sulfur dye. (b) it uses one oxidization system to oxidize 1 or multiple reduced vat dyes, or 1 or multiple reduced sulfur dyes that are adhesive to the processing material. Above oxidization system includes (i) oxidization source and 1 or multiple enzymes that show activity of oxidase. (ii) hydrogen peroxide source and 1 or multiple enzymes that show activity of peroxidase. It thus converts 1 or multiple reduced dyes to their original oxidation insoluble colored form. Materials: cotton yarn, diacetate, twine, fur, animal skin, leather, linen, lyocel, polyacrylic acid, polyamide, polyester, ramie, artificial silk, natural silk, tencel, triacetate, viscose rayon, wool fabrics, thread, fiber, clothes or film. |
