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Acid Dyes
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Apr 30, 2026
2:37 AM

Acid dyes are dyes that are commonly applied to textiles at low pH and consist of acidic molecules. When acid dyes are dissolved, the process of dyeing with acid dyes mainly takes place in water and therefore can interact with the dyed material. Acid dyes are highly water-soluble and have better light fastness than basic dyes. Textile acid dyes are effective for the dyeing of protein fibers such as silk, wool, nylon and modified acrylics. They contain sulfonic acid groups, usually present as sodium sulfonates. These increase the solubility of dyes in water and give the dye molecules a negative charge.

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