The Chemical Properties Of Eco-Print Leather-Tanned With Vegetable Tanning Agent: Gambier

Abstract Tanning materials in leather production usually use materials that are not environmentally friendly such as chrome. To implement clean production in the leather tanning process, the use of vegetable tanning is starting to be widely studied, one of which is gambier. This research aims to evaluate the influence of various levels of ingredients tanner vegetable (gambier) on the chemical properties of eco-print-tanned sheep leather. The treatment consists of five variations of tanner ingredients (vegetable tanning, gambier) 10%, 15%, 20%, 25%, and 30%. The variables measured include fat content, ash content, water content, and tannin content. From the results, the level of gambier as vegetable tanning had a significant effect on fat content instead of ash content and water content. The highest fat content was found in the 30% tanning treatment (18.93 ± 0.7%) while the ash content and water content did not show significant differences between treatments, with average values of 1.82-1.94% and 15.33-18.00%. This research concluded that the utilisation of gambier as a vegetable tanner at various levels affects the fat content of sheep leather, but had no significant effect on the ash content and water content.