Abstract
In the historical road of human mining natural dyes, “plant dyeing” occupies a considerable part. Plant dyes are from nature and used for environmental protection, so they have high development value. In this paper, the dyeing properties of cashmere dyed with gardenia blue pigment were studied. Through orthogonal test and single factor analysis, the effects of pH value, reaction temperature, dye mass fraction and reaction time on color characteristic value and color fastness were investigated. The optimum direct dyeing process of gardenia blue on cashmere fiber was determined as follows: pH value of dye solution is 4.0 – 4.5, dye mass fraction is 7.5% o.w.f, temperature is 75 °C, time is 50mins, bath ratio is 1:30. Direct dyeing and mordant dyeing were used to dye gardenia blue on cashmere fiber. The results show that different blue effects can be dyed by different mordants. When ferrous sulfate was used as mordant, the dyeing depth increased, but the color became gray. When copper sulfate is used as mordant, the dyeing depth increases and the color light changes most obviously due to the influence of copper ions.CLC No: TS 194.1 Document identification code: A
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