紫甘薯红色素上染柞蚕丝织物的染色性分析

以紫甘薯红色素水溶液为染液,用直接染色方法和稀土媒染方法对柞蚕丝织物染色,以明度、饱和度、色差和上染率为检测指标,研究了上染工艺和染色效果。通过正交试验和单因素分析确定了直接染色最佳工艺条件:染液质量浓度5g/L,染液pH=4,染色温度80℃,染色时间60min,浴比1∶40;预媒染的最佳工艺条件是稀土2.5g/L,媒处理温度70℃,时间45min。结果表明,染色后的织物色泽鲜亮,经预媒染织物明度和色差有所降低,皂洗牢度和摩擦牢度较直接染色织物提高1～2级。

Analysis on dyeing tussah silk fabric with purple sweet potato colorant

The tussah silk fabrics was dyed with purple sweet potato colorant with dyed and with rare earth mordant dyed methods.The optimal process for dyeing and pre-mordant dyeing was obtained by orthogonal test and single factor analysis,in which dye concentration is 5 g/L,pH is 4,dye temperature is at 80 ℃,dyeing time is for 60 min,liquor ratio is 1∶40,rare earth′s dosage is 2.5 g/L,pre-mordant processing temperature is at 70 ℃,process-time is for 45 min.The dyed fabric showed bright color,the lightness and ΔE of the pre-mordant dyed fabric was reduced,the washing fastness and rubbing fastness of the dyed fabric were improved by 1-2 degree.