직/편성물 염색

pH AND BUFFER SYSTEMS IN DYEING

  • 출판일1997.11
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 275
The control of pH in dyeing is accomplished by three fundamentally different techniques: maintenance of a relatively high degree of acidity or alkalinity; control of pH within narrow tolerances of the neutral region; and the gradual shifting of pH as dyeing proceeds. The first approach is the easiest to control. The second approach requires more awareness of the factors that determine pH. Most dyeing systems requiring this approach operate in the pH 4-9 region and are sensitive to slight changes in pH. The third approach is useful with nonmigrating acid dyes on wool and nylon. Similar systems hasv ebeen proposed for reactive dyes on cellulosics. The function of buffers in dyeing is discussed. Sodium acetatc and acetic acid are common buffers used in dyeing; other buffers include pyrophosphoric acid, boric acid, citric acid, and sodium carbonate. 3 refs.
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