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Natural Indigo Dyeing of Wool by the One Step Reduction/Dyeing Method

일단계 환원/염색에 의한 모직물의 천연인디고 염색

  • Son, Kyung-Hee (Dept. of Clothing & Textiles, Chonnam National University/Human Ecology Research Institute, Chonnam National University) ;
  • Shin, Youn-Sook (Dept. of Clothing & Textiles, Chonnam National University/Human Ecology Research Institute, Chonnam National University) ;
  • Yoo, Dong-Il (School of Applied Chemical Engineering, Chonnam National University)
  • 손경희 (전남대학교 의류학과/전남대학교 생활과학연구소) ;
  • 신윤숙 (전남대학교 의류학과/전남대학교 생활과학연구소) ;
  • 류동일 (전남대학교 응용화학공학부)
  • Received : 2010.01.13
  • Accepted : 2010.03.11
  • Published : 2010.03.31

Abstract

One-step reduction/dyeing method was optimized for wool dyeing with natural indigo dye in this study. The effects of reduction/dyeing conditions including dye temperature and time, the pH of bath, concentration of dye, and reducing agent on dye uptake and color were investigated. The dye uptake was higher with no addition of alkali. Dyeing was carried out through the use of only sodium hydrosulfite in the bath. The maximum dye uptake was obtained at $60^{\circ}C$ for 30min and the dyed fabrics appeared in the PB Munsell color range. Dye uptake improved with the increase of a natural indigo dye concentration with the same sodium hydrosulfite concentration. At a higher dye uptake, the fabric color became more purplish and the maximum absorption shifted from 660nm to 620nm. Color reproducibility was reliable with a color difference in the range of 0.41~1.43. Regardless of color strength, washing and dry cleaning fastnesses were good with a 4/5 rating, and fastnesses to rubbing and light were acceptable with a 3/4~4 rating.

Keywords

Acknowledgement

Supported by : 한국연구재단

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