Journal
DYES AND PIGMENTS
Volume 88, Issue 3, Pages 396-402Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2010.08.018
Keywords
Reactive dyes; Modified vinylsulfone; Silk; Dyeing; Wash off
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The exhaustion and fixation of three commercial aminochlorotriazine/masked vinylsulfone dyes were both pH- and temperature-dependent Optimum dye fixation was obtained at pH 8 as a corollary of a high number of nucleophilic -NH2 groups in the fibre high conversion of the masked form of the dye to the reactive VS variant as well as reaction with OH-containing amino acid residues The marked temperature-dependence of dye fixation achieved in the pH range 3 to 9 demonstrated the importance of kinetic factors in dye fibre reaction The wash-off method used was very effective in removing unfixed/hydrolysed dye from the silk fabric and as a result the dyeings displayed very good fastness to washing at 40 degrees C (C) 2010 Elsevier Ltd All rights reserved
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