Printing process of natural gardenia blue dye on silk fabric
The properties of natural gardenia blue dye in silk printing were studied.The influences of mordant method,mordant type,mordant dosage,steaming time and pH on printing performance were discussed.Choosing ferrous sulfate as a mordant,the printing process of gardenia blue on silk fabric was optimized.The results show that the optimal printing process of gardenia blue on silk fabric was as follows:same medium printing method,gardenia blue dye 2%,guar gum 5%,ferrous sulfate 3%,urea 8%,pH 3,steaming time about 20 min.The printing fabric color is darker,and the color fastness is good.
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