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Acid Dyes is a kind of water soluble dyes and is stained in the acid medium. Most of the contain sodium salt and can dissolve in water. Acid Dyes have bright color and complete chromatogram.
They are mainly used for dyeing wool, silk and nylon. And they can also be used for dyeing leather, paper, ink, etc. In general, they can be divided into three groups, including strong acid dyes, weak acid dyes and acid metal complex dyes.