A simple titrimetric method for the estimation of reactive dye fixation on cellulosic fabrics

V. Murtagh, J. A. Taylor

Research output: Contribution to journalArticlepeer-review

Abstract

A high level of fixation, of dye to fibre, is an essential feature of commercially successful reactive dyes. The commonly used methods of determining dye fixation involve either (1) collection and optical assessment of all unfixed dye within the dyebath and combined wash liquors or (2) dissolution of dyed fabric in 70% sulphuric acid and optical assessment of resulting dissolved colour. Occasionally the optical strength of dyeing has been used as a measure of dye fixation: this makes the assumption that the observed colour strength of a piece of dyed fabric is proportional to the concentration of dye. It has been found that azo dyes fixed to cellulosic substrates are readily reduced by titanous chloride. The quantity of titanous chloride utilised in this process is readily quantified by titration, thus providing a simple and rapid method for the determination of dye fixation. The results of this method were in good agreement with those of the sulphuric acid dissolution method. © 2004 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)17-22
Number of pages5
JournalDyes and pigments
Volume63
Issue number1
DOIs
Publication statusPublished - Oct 2004

Keywords

  • Dye fixation
  • Reactive dyes
  • Titanium (III) chloride
  • Titrimetric analysis

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