The purpose of this study is to investigate the efficacy of Carthamus tinctorius, which shows high affinity to wool, for human hair dyeing as a natural dye. Before dyeing human hair with C. tinctorius, virgin hair was bleached by a conventional method...
The purpose of this study is to investigate the efficacy of Carthamus tinctorius, which shows high affinity to wool, for human hair dyeing as a natural dye. Before dyeing human hair with C. tinctorius, virgin hair was bleached by a conventional method using hair shop in the city. In order to study the dyeing properties of C. tinctorius on human hair, the effects of dyeing conditions on dye uptake, color difference (△E) and morphology were investigated. And the effect of alum and tannin mordanting on color change was also investigated. Dye uptake changed marginally as mordant contents increased in the range of 0.1~0.7g of tannin but not alum. Dye uptake increased progressively as deposition time increased in the range of 10~40 min. Shampooing fastness of NCy-HR using 0.7 g Alum showed the fellowing order, NCy-30HR>NCy-40HR>NCy-20HR>NCy-10HR. The hair was little damaged by bleaching, but cuticles were melted and stripped away by dyeing for longer time.