Acid Dye Sources,application and uses
Acid Dye Content 1.Define/Definition 2.Sources 3.Application of acid dye 4.Uses of acid dye Acid dyes are sodium salts of sulphonic acid but there are a few containing carboxyl groups. The acid dyes have direct affinity towards protein fibers and polyamide fibers. An acid dye is a dye that is typically applied to a textile at low pH. They are mainly used to dye wool, not cotton fabrics. Some acid dyes are used as food colorants Sources: The name “Acid dye” gives some insight into its chemical composition. As the name implies, acid dyes consist of acidic molecular groups that characterize the compounds. The process of using acid dyes predominantly takes place in water, when the acid dye is dissolved and therefore able to interact with the material being colored. Historically, acid dyes were most commonly used to dye materials consisting of protein fibers. The acidic pH of the dye-bath allows the dye molecules to bond to the protein fibers.