DYEING METHOD FOR SILK FABRICS USING DYESTUFF EXTRACTED FROM NATURAL INDIGO

摘要

A method for dyeing a silk fabric is provided to dye excellently the silk fabric without damaging the silk fabric and improve the antibiotic performance of the silk fabric, by using natural indigo dye. A submersion solution is prepared by submerging leaves in an acidic solution having pH of 4.0-5.0 at a temperature of 40-50°C. Air is supplied to the submersion solution to generate sediment in the submersion solution. The sediment is separated from the submersion solution. The separated sediment is dried to prepare indigo dye. The indigo dye and sodium hydrosulfate are mixed into water to prepare a dye mixed solution. A silk fabric is dyed by the dye mixed solution while the dye mixed solution has a temperature of 30-40°C.