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Acid dyes

Acid dyes are used to dye protein fibres and nylon. Protein fibres include silk, wool, feathers.  The dyes are set by moisture, heat and an acidic environment. There are two categories listed : powdered acid dyes and liquid steam fix silk painting dyes. Both can be used in a hot immersion bath, or set in the microwave when still wet. , They can be painted and then steamed to be set.