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t dyes: Vat dye chemistry would not be completed if without indigo, whose structure was elucidated in 1883. Indigo is applied as its water-soluble form, produced by the reduction with sodium dithionite, and it is still used extensively for the dyeing of denim.
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Cationic DyesCationic dyes are a type of textile dye, also known as basic dyes or salt-based dyes. They dissolve in water to form cationic states, ionizing in aqueous solutions to produce colored ions with positive charges. The cationic groups of these dyes can bind with acidic groups in the third m
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