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The Effect of Aftertreatments on the Fixation Ratio and Total Extent of Reaction of a Difluorochloropyrimidine Dye on Wool
Author(s) -
FINNIMORE E.,
MEYER U.,
ZOLLINGER H.
Publication year - 1978
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1978.tb03373.x
Subject(s) - dyeing , wool , fixation (population genetics) , chemistry , ammonia , significant difference , fixation time , textile , pulp and paper industry , materials science , composite material , organic chemistry , biochemistry , mathematics , medicine , statistics , engineering , audiology , gene
47th Communication on Investigations in Textile Chemistry. For 46th Communication see reference [9]. The difference between fixation ratio and extent of reaction in reactive dyeing of wool is explained. Methods of aftertreatment of deep colours have been examined as a means of improving both these values. Increases in the extent of reaction are favoured by high levels of exhaustion as well as by prolonging the time at the dyeing pH. The fixation ratio is improved by desorbing the unfixed dye, and this has been done by raising the pH at the end of the dyeing. The pH at the temperature of the aftertreatment was found to have a critical effect on the efficiency of the process, the best results being obtained with buffer treatments, whereas with the usual ammonia aftertreatment, in which the pH was found to decrease with time, the results were much less effective. On Hercosett 57‐treated wool the effect was bigger than on untreated wool.