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Priority to BG9595192ApriorityCriticalpatent/BG51643A1/en
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This method finds application in dyeing textile materials, such as wool and silk, with cationic dyes in acid environments. It allows reducing the reagent consumption for an equal whiteness of the treated fabric, increasing the obtained colour resistance to wet treatment and improving the uniformity of dyeing. The method involves treating the textile material in a bath containing sodium hydrogen sulfite at 5-12 g/l and sodium vinyl sulphonate at 20-80 g/l at a ratio of 1:50 - 1:100 and 30-50 degrees C for 10-30 minutes, followed by adding 30 percent hydrogen peroxide solution at 8-17 ml/l to the bath and extending the treatment by a further 20-60 minutes at a temperature 10-70 degrees C. The fabric is then washed with cold water, drained on a foulard to a water content of 70 percent and dried at 80 degrees C for 15 minutes. The treated protein-based textile material is dyed by a conventional method using base (cationic) dyes of the type normally used on polyacrylonitrile fibres.
BG9595192A1992-02-201992-02-20Method for dyeing textile materials
BG51643A1
(en)