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Effect of Sera Fast C-B concentration (using steaming or thermofixation after cationisation) on K/S values of dyed cotton and cotton/wool fabrics with the reactive dye.

Effect of Sera Fast C-B concentration (using steaming or thermofixation after cationisation) on K/S values of dyed cotton and cotton/wool fabrics with the reactive dye.

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A novel application involving printing anionic dyestuffs, namely reactive, direct and acid dyes on cotton as well as 70/30 cotton/wool substrates is fulfilled using a cationic reactant. This technique involves using two steps: the first step is printing with a recipe that includes only the thickening agent and the cationic reactant followed by stea...

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... the substrates are dyed with Levafix Turquoise Blue PN-G, washed off and the K/S values are assessed. In order to investigate the effect of cationisation on the colour yield of the dyed fabrics, different concentrations of the cationic reactant are incorporated in the paste (0, 20, 40, 60, 80, 100 and 160 g/kg) and the results are plotted in Fig. 1. It can be observed from the figure that, increasing cationic reactant concentration is accompanied by improving the colour yield of the dyed fabrics regardless of both: fabric type as well as the fixation method that proceeds cationisation process. It should also be noted that, greater enhancements in colour yield occur on cotton/wool ...

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