Utilization of Temple waste flower -Tagetus erecta for Dyeing of Cotton, Wool and Silk on Industrial scale

Padma S. Vankar

Abstract


Huge amounts of Tagetus erecta (marigold) flowers are offered in temples in India, creating a very large waste. This waste flowers were collected and used for industrial dyeing. Tagetus belongs to the family Asteraceae. It produces natural dye from its flowers (petals) consisting mainly of carotenoid-lutein and flavonoid- patuletin, these colorants have been isolated and identified. The crude extract has been used for dyeing textiles. In the present study innovative dyeing with Tagetus has been shown to give good dyeing results. Pretreatment with 1-2 % metal mordant and 5 % of plant extract (owf) was found to be satisfactory and showed very good fastness properties to dyed fabrics of cotton, wool and silk. Innovative solvent extraction of dry flowers of Tagetus erecta with ethanol was found to have high extraction efficiency allowing selective extraction of flavonoids and carotenoids. This is an easy extraction process, where ethanol solvent was removed and recovered. Crude extract was diluted with deionsed water and used for dyeing. CIELab and K/S of the dyed fabrics were also evaluated. The superiority of solvent extraction over conventional extraction has been established through this study.

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