Abstract:

Water soluble yellow dye was extracted from turmeric rhizomes (Curcuma longa L.), collected from Lucknow, Shillong and from local market, through aqueous/solvent extraction procedure using vacuum evaporator and spray drying of aqueous extract. Shillong sample was found to contain higher dye content (21.3-27.6%) followed by Lucknow sample (15.5- 18.9%) and market sample (14.0-18.2%). Shillong sample was also been found to be rich in curcumin (6.6%) with compare to other samples (2.4-2.5%). Dyeing experiments were performed under different conditions of direct dyeing, pre-fixing treatment, mordanting treatment or/and simultaneous mordanting. 2% dyeing at 50-55º C for 30-60 min was most appropriate to obtain good dyeing results. Numerous shades were obtained with good wash fastness properties. Emphasis has been laid to ensure ecofriendly dyeing profiles using soft or natural mordants and no salt of heavy metals were used.