DefinePK

Abstract

Gambier is a kind of sap that comes from compressed extract of leaves and twigs of gambier plants (Uncaria Gambir Roxb.). The use of gambier is being developed for natural dye of textile products such as weaving yarn. Previous research showed that solution of gambier 5% had been good enough to be used as a textile dye. Gambier residual dyeing solution is liquid waste that still contains active ingredients namely tannins and catechins which still can be reused. This study was aimed to see whether the waste can be reused for dyeing and to see the quality of products. The study was conducted using cotton yarn and mordant Calcium Oxide (CaO) with 2 treatments namely dyeing time (5, 15, and 25 minutes) and kind of liquid waste (1st reuse and 2nd reuse). The utilization of fresh gambier solution was done as a control. The results showed that gambier liquid waste of dyeing still contain tannins up to 52.14% and still can be used as a textile dye. The dyed yarn quality using 1st and 2nd reused dye waste showed that for all treatments, color fastness on washing 40°C as well as on dry ironing heat were good to excellent (4-5) averagely. The results were not significant compared to yarn quality which was dyed with fresh gambier solution. Color fastness on sunlight in dyeing with 1st and 2nd reuse were moderate until fairly (2-3). The results were lower compared to dyeing with fresh gambier solution that had an average value ? 4 (good). Dyeing treatment affected the color strength value. Dyeing with 1st and 2nd reuse generated a darker color than dyeing with fresh gambier solution. Dyeing in 2nd reuse had the highest color strength with K/S value 13,810-16,871.