Acid Dyes

Description

Acid dyes are a class of water-soluble anionic dyes that are primarily used to dye protein fibers such as wool, silk, and nylon. They are called "acid dyes" because they are applied from an acidic dye bath, typically using acetic or sulfuric acid to help fix the dye to the fiber.

Key Characteristics

• Water-soluble: Dissolve easily in water, making them suitable for immersion dyeing.
• Anionic (negatively charged):React with the positively charged sites on protein fibers.
• Bright colors: Known for their vibrant and intense hues.
• Good leveling properties: They distribute evenly on fibers during dyeing.
• Poor washfastness on cellulose: Not suitable for cotton or other plant-based fibers unless a mordant is used.

Applications

Textile Industry

Leather Industry

Paper Industry

Biological & Medical Fields

Hair Dyes

Food Industry