Acid Dyes are most commonly used for wool, polyester, nylon, & non-cotton fabrics. They are applied under low pH conditions for delivering high brightness and good fastness properties. These dyes also have a role to play in the medical industry for staining sample tissues for microscopic examination. They show excellent effectiveness on silk, angora, and feathers. Acid Dyes tend to create a strong bond with the substrate and assure superior washfast& lightfast properties. They are available in anthraquinone, azo dyes, & triaryl methane dye compositions at reasonable rates.