| Summary: | 碩士 === 國立屏東科技大學 === 客家文化產業研究所 === 102 === The research and survey reports on the “Fashion Poison” series from 2011 to 2012 indicated that 20 cross-national fashion brand apparel companies used many toxic and harmful chemical substances in their production processes. Currently approximately 60% of the global production of denim apparels is centered in mainland China. Azo dyes are necessary in the process of making “blue dye” for denim fabric, some of which will release aromatic amine. After the mixture, the fabric dyeing wastewater is a hazardous substance that cannot be dissolved naturally. If it is discharged without sewage treatment, it will seriously affect ecological environment.
This study aims to understand the procedure of extracting blue dye from plants and making blue dye solution; to explore the degree to which denim fabric absorbs dye when using traditional and fast blue dye techniques; to analyze and compare the difference in color fastness between denim fabric colored with blue dye that is extracted from plants and commercial
denim fabric; and to construct the optimal process of making Hakka blue dye and dyeing denim fabric with it. An experiment was conducted on four different types of white denim fabrics dyed using traditional and fast methods of making blue dye solution, as well as on commercial denim fabric, in order to examine and analyze the color fastness of these fabrics.
The research results showed that the experimental values of the denim fabrics dyed using traditional and fast methods of making blue dye solution are greater than those of the commercial denim fabric in color fastness to washing, color fastness to rubbing, color fastness to hot pressing, and color fastness to dry heat. However, the experimental value of the commercial denim fabric is greater than that of the denim fabrics dyed using traditional and fast methods of making blue dye solution in color fastness to perspiration. For commercial production in the future, the fast method of making blue dye solution is superior to traditional one in terms of reducing production costs. Thus, it is feasible to apply Hakka blue dye technique to denim fabrics, which, by replacing the use of chemical dyes, can reduce environmental pollution.
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