Acid Dyes

Acid dye refers to an acid group in the dye molecule, also known as an anionic dye, which can be combined with an amino group in a protein fiber molecule by an ionic bond, and is suitable for acidic, weak acid or neutral conditions. Mainly azo and anthracene structures, a few are aromatic methane structures. Dyes and colors are generally compounds which are self-colored and which provide a clear and strong color to other substances in a molecular state or in a dispersed state.