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nature : also known as vulcanization polycondensation dye. Water-soluble molecule with Thiosulfate (eg - SSO3Na) of the dye. When completed after staining with sodium sulfide, in Sulfite off at the same time enable molecular disulfide formation, a number of dye molecules in the fiber into each other polycondensation insoluble dye aggregates and anchor in the fiber. Polycondensation of bright color dyes, low price, except for the cellulose fibers such as cotton, but also for Villeneuve, wool and silk dyeing.
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