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Acid dye process


A type of synthetic water-soluble dye that can color protein fibers such as wool, silk, and nylon, as well as some synthetic fibers, is called an acid dye. These dyes need acidic conditions to work well on the fibers. Acid dyes attach to the fibers' amino acid groups through ionic interactions, creating a strong bond. The coloration is bright and durable and does not fade easily. The dyeing method usually involves soaking the fibers in a hot dye solution that contains the acid dye and an acidic substance like vinegar. Acid dyes have transformed the dyeing of protein-based textiles, allowing for a variety of colors and shades with excellent color fastness.

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