Compatibility of Dye Mixtures

Abstract

The dyeing behaviour of a number of dye mixtures on three types of fibre has been studied by the method based on assessment of colour build up under practical dyeing conditions, as well as under ideal conditions. Some a*b* and L*C*ab diagrams are constructed for both the conditions. These diagrams give valuable information about the dyeing behaviour of the dye mixtures. The technique reported in this paper will prove useful to a practical dyer for determining the compatibility of dyes in mixtures.

Studies on Color-Strength-Related Parameters and Compatibility for Dyeing of Cotton Fabric with Binary Mixtures of Jackfruit Wood and Other Natural Dyes

“…Compatibility of a pair of dyes can be judged by different approaches (Datye and Mishra 1984;Shukla and Dhuri 1993;Shukla and Dhuri 1992;Shukla and Dhuri 1992;Blackburn and Gallahher 1980;Singh et al 2006;Samanta et al 2007), which have been described in our earlier communication (Samanta et al 2007). However, the method of plotting ΔC versus ΔL and/or K/S versus ΔL values for two sets of progressive shades obtained by varying dyeing time/temperature (Set I) and varying total dye concentrations (Set II), may be considered to be more rational and practical, as the other methods of test of compatibility (Datye and Mishra 1984;Shukla and Dhuri 1992) are based on the assumption that the dyes are noninteracting and the rate of dyeing for a dye does not change in the presence of other dye, which is not necessarily true.…”

“…There are only a few discrete studies available in the literature describing application of mixture of natural dyes on cotton textiles (Samanta et al 2001; reporting color strength and related color interaction parameters, including metameric effects but not the compatibility of mixtures of natural dyes. However, many studies of the compatibility of binary and ternary mixtures of synthetic dyes are available in literature (Datye and Mishra 1984;Shukla and Dhuri 1993;Shukla and Dhuri 1992;Shukla and Dhuri 1992;Blackburn and Gallahher 1980;Singh et al 2006).…”

“…However, the method of plotting ΔC versus ΔL and/or K/S versus ΔL values for two sets of progressive shades obtained by varying dyeing time/temperature (Set I) and varying total dye concentrations (Set II), may be considered to be more rational and practical, as the other methods of test of compatibility (Datye and Mishra 1984;Shukla and Dhuri 1992) are based on the assumption that the dyes are noninteracting and the rate of dyeing for a dye does not change in the presence of other dye, which is not necessarily true. Moreover, all the dyeing process variables also influence the dyeing results for dyeing with mixtures of dyes (Datye and Mishra 1984) and hence it is preferable to use a method of the test of compatibility where the results of dyeing are derived by dyeing the substrate with a mixture of dyes under practical conditions of dyeing as compared to dyeing of the samples with individual dye, and then to predict the compatibility from rate of dyeing or other dyeing results. Besides the test of compatibility by conventional methods, in the present work a newer method of assessing Relative Compatibility Rating (RCR) for binary mixture of dyes has been proposed, where a newer index called color difference index (CDI) has been postulated and the same has been used for assessing the relative compatibility rating of selective binary mixtures of those natural dyes.…”

“…To test the degree of fitness of this newer proposed method, the test results of the compatibility between the two methods have been compared. The degree of closeness or overlapping between Set I and Set II samples for each binary mixture of natural dyes (M1 to M5) though cannot be quantified but can be graded as 1 through 5 as shown by Datye and Mishra (1984), depending on residual shade buildup in both Set I and Set II, assessment of degree of closeness or overlapping of the curves. Hence, the results of both Method I and Method II are comparable.…”

Feasibility of using digital color imaging devices for the determination of cationic dyes compatibility

“…Accordingly, the lack of enough accuracy in dyes selection may lead to unacceptable dye levelness and/or colorfastness. Therefore, it is necessary to use the appropriate combination of dyes with convenient compatibility, which means none of the individual dyes in the combination have detrimental effect on the dyeing characteristics of the rest of the dyes in the combination …”