We are a trustworthy manufacturer of 0.5% 90 Acid Violet Dyes in the market. These are typically used for dying natural protein (wool and silk), synthetic polyamide (nylon) and to a small extent acrylics and blends of these fibres. 0.5% 90 Acid Violet Dyes are so called because they are applied to these fibres from dye bath in acidic or neutral conditions.