Abstract
The purpose of this study is to examine the influence of the pigment characteristics and changes of the dying properties and functionality for extracted Curcumae longae Rhizoma using distilled water and ethanol as solvents. Changes in dying conditions include variations in dye concentrations, dyeing temperatures, and the dye uptake time. The K/S value was compared with those change factors. Additionally, color changes were observed through a mordant. An ultraviolet-visible spectrum was used to investigate the pigment characteristics, and as a result, tannin was identified in the distilled water extract, whereas berberine and chlorophyll could be recognized in the ethanol extract. Hydrolyzable tannin could also be verified in FTIR analysis, in the distilled water extract. For the ethanol extract, curcumin was verified through an absorption band of C=C, which is an aliphatic, aromatic spectrum around 1650-1450 cm-1. When dying in fabrics, the dye uptake increased as concentration of the extract grew, and the optimum dyeing temperature and time were determined to be 60 ℃ and 60 minutes, respectively. The dyed fabrics’ colors were basically all yellow colors, and their adjustment in brightness was available depending on the type of mordant. The color fastness was good in fabrics dyed with either ethanol or distilled-water extracts, except for rubbing and perspiration. Thus, it can be concluded that by selecting the right extracting method, by proper dyeing, and mordant application according to given needs, such dyed fabrics can be used as eco-friendly, functional clothing material.
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