Optimization of Marigold Flower Dye Using Banana Peel as a Biomordant

This research aims to optimize the dyeing process of marigold flower dye by using banana peel extraction as a biomordant in cotton fabrics. In the beginning, we investigated the optimal condition for extracting tannin compounds from fresh banana peel. Then, the woven cotton fabrics were dyed with marigold flower extraction at 90°C for 60 min with three different mordanting methods; pre-mordanting, post-mordanting, and meta-mordanting. With meta-mordanting, the ratios of mordant to dye solution were varied. The mordanting temperature and time of each methods were studied. The color strength, CIEL*a*b*, wash fastness, and light fastness were also inspected. It was found that the optimal condition for tannin extraction from the fresh banana peel was at 90°C, 1 h. When dyeing cotton fabrics with marigold flower dye by the pre-mordanting and post-mordanting method, the optimal mordanting condition was achieved at 60°C, 120 min, as the dyed fabrics showed the highest color strength. Moreover, the optimal condition of meta-mordant method was shown at 30°C, 90 min at the mordant to dye = 2:1 and 30°C, 60 min at the mordant to dye = 1:1 and 1:2. The color fastness of the mordanted cotton fabric was improved, especially the post-mordant method.