Utilization of Indigofera Leaves as Natural Dyes for Silk Fabrics

Abstract Indigo is a natural blue dye produced from the leaves of Indigofera plant, which environmentally friendly and non-carcinogenic. This study aimed to determine reduction potential value molasses brown sugar as reducing agents, examine effect hydrochloric acid concentrations aeration time on amount indigo, test fastness rubbing against solar heat, dry, wet silk fabrics that were dyed by indigo with various fixators. To extract dye, Indian glycosides contained in hydrolyzed indoxyl glucose using acid. Indoxyl was then oxidized polysaccharide compound. The results showed concentration 0.01 M highest content 26.83 ppm, best 4 hours produce 22.32 ppm. fixator types different colors. ferrous sulfate dark blue-green color, limestone light while alum bright color. same result gray sale 4-5 meaning there slight fading.