The candied turmeric dye contains of three closely related pigments, specifically, curcumin, oleoresin and demethoxy curcumin and bis-methoxy curcumin. All three constituents have alike solubility features and tinctural power. Factual curcumin shows a more reddish shade.
Turmeric dye is the most popular natural dye in fabric coloring. The vigorous colouring element in turmeric rhizome is Curcumin. It is also identified as Natural Yellow.
Turmeric is the brightest yellow natural dye, which belongs to the diaroylmethane group called difer-uloylemethane. Turmeric dye also recognized for its anti-carcinogenic, anti-inflammatory, anti-microbial, anti-parasitic, anti-mutagenic and anti-inceptive properties, as well as for the formation of sunscreen products. Therefore, natural dyes such as turmeric dye are generally non-substantive. and must be smeared on textiles with the help of harsh such as terminalia chebula (“kadukkai”). Turmeric has antioxidant and skin-lightening properties. Therefore, making these compounds useful in cosmetics preparations.
EXTRACTION OF TURMERIC COLOUR
The dye was made by extracting turmeric powder from deionised water at neutral pH, at 95°C for 1.5 hours. The acquired Curcuma Longa extract solution (dye solution) had a yellowish colour.
Dyeing of cotton cloths using traditional technique, with the natural colouring matter extracted from Terminalia Chebula (kadukkai). And turmeric as a caustic at goods to liquor ratio 1:40, at 60°C, for 60 min. After dyeing, washing of samples must per- formed in warm and cold deionised water.