Young-Ae Yang  Eunjou Yi

Vol. 60,  No. 2, pp. 64-74, Apr.  2023
10.12772/TSE.2023.60.064

mixture dyeing persimmon garden balsam Optimization response surface analysis

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This study was performed to develop optimized dyeing conditions with mixture of persimmon and garden balsam for maintaining traditional color of persimmon-dyed cotton fabric and for improving its stiffness. A response surface method was applied to optimize the mixture dyeing conditions with persimmon dye concentrations and heat treatment time as independent variables and with physical color difference variables (?L*, △a*, △b*, △Eab) and flex stiffness as dependent variables. Some comfort properties and skin-health functions were evaluated for cotton fabric dyed under the optimized conditions. As results of response surface analysis, mixture ratio of persimmon dye and heat treatment duration were found to affect significantly color difference variables and flex stiffness considering both 2D response contour plots and 3D surface plots. Finally optimum conditions of mixture dyeing were determined as mixture ratio of 70% persimmon and 30% garden balsam and 15 min of post-heat treatment. Cotton fabrics dyed under optimized conditions showed good dyeing fastness with 3-5 grades. As for comfort properties, air permeability, Qmax, and water repellency of mixture-dyed fabric under the optimized conditions were similar to single persimmon dyed cotton fabric. Their sun protection properties like sun block rates and antimicrobial activity including microbial reduction rates were revealed as excellent, which implies that the optimized dyeing conditions with mixture of persimmon and garden balsam could be utilized to develop a novel naturally dyed textiles for skin-health with traditional color and improved touch.