직/편성물 염색

The Levelness of Dyeings from Reused Direct Dyebaths.

  • 출판일1996.09
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 293
Although dyebaths for direct dyes are prime candidates for reuse, salt present in the recycled dyebath hampers the slow addition of salt during the dyeing process. Level dyeing of Class B and Class C direct dyes is especially difficult in the presence of salt. Researchers added dye to a salt containing bath at either the beginning of the dyeing process or slowly at dyeing temperarture, and compared the effect of the two methods to conventional methods of dyeing mercerized cotton print fabrics with C.I. Direct Red 23 and C.I. Direct Blue 126. An evaluation of dye concentration, liquor ratio, and salt addition methods indicated that levelness was best in the control dyeing, less satisfactory when dye was added to the dyebath containing cold salt, and worse when the dye was metered into the hot dyebath. In all three methods, the dye levelness for both Class B and Class C direct dyes improved with increased dye concentration and with liquor ratio. 15 refs.
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