ADVANCED APPROACH FOR TRICHROMY FORMULATION IN CONTINUOUS DYEING

Reactive dye fixation to color yield of dyed cellulosic fibre significantly depend on the dye diffusion extent into the fibre polymer matrix. In case of pad-dyeing process dye diffusion exerts more significant influence on dye fixation, consequently color yield takes place. Dye selection concepts based on performance tests requires tedious experimental work which remains always very difficult in continuous processes. In order to overcome this problem, this research work will provide an appropriate platform to understand and optimize the diffusion coefficient which plays important role in best trichromy selection by converting visual performance tests into data. The dye diffusion extent of reactive dyes into the fibre in pad dyeing using Kubelka-Munk equation is the correct for optimization and judicious dye selection. Dye diffusion index influences the dye fixation, ultimate color yield to color fastness of dyed fibre to digital color values. Various characterization techniques like affinity of different dyes by capillary test method, diffusion extent of individual dye by kubelka- munk equation method, drop test of individual dye its conversion into data form and dry migration of these dyes using disc method are used in this study