Can be dissolved in water, the boiling can be directly to the cotton fiber dyeing D for which kind of dye
And there is a drawback is easy to fade easy to color.
But the direct dye does not belong to environmental dyes, and now the regular dyeing factory are not used.
Can be made of cotton fiber color, but also soluble in water on the direct dye and reactive dyes, direct dye boiling no problem, but the reactive dyes are high temperature and low temperature type, high temperature type to B word and K word at the beginning; The choice is vulcanized, but when the melting to add a certain amount of sulfurized alkali can be completely dissolved in water, cooking no problem, but the dyeing is finished by oxidation, the comparison between the three, vulcanization of the cheapest, , But the color is dark, the most expensive active price, fastness can still, the most brilliant color, direct dye center. As for environmental protection is not environmentally friendly, it depends on the specific dyes, and now the newer varieties are basically up to the EU standards, and there are requirements in this regard to the dye suppliers for testing to prove.
