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Illuminating acid dyes work effectively when combined with discharge paste as they have a high resistance to bleaching agents. A concentrated stock solution of 5% dye using hot water and vinegar (or citric acid), is combined with up to the same amount of discharge paste. This paste is applied to the ready dyed fabric with a brush or stamp. When dry, the discharge paste is activated by pressing the fabric with a hot iron on a steam setting. The final stage is to set the replacement dye colour using the traditional steam fixing technique, before rinsing away the surplus dye and chemicals.
The image shows discharge printing with illuminating dyes on black velvet. Learn more about discharge printing from our Blog.