KUALITAS KEKUATAN TARIK DAN KEMULURAN KULIT ECOPRINT DARI BERBAGAI JENIS MORDAN

Ecoprint techniques still predominantly use heavy metal-based mordants, which are toxic and harmful to the environment. Therefore, there is a need for eco-friendly natural mordants that are effective in enhancing ecoprint quality while being environmentally safe. This study aimed to evaluate the tensile strength and elongation of ecoprinted leather using three different mordants: Epsom salt, sodium acetate, and acetic acid. The research employed an experimental method with a Completely Randomized Design (CRD). The tools and materials used in this research include 9 sheets of sheep crust leather, mordants, a modified steaming machine, analytical balance, basin, measuring cup, pencil, scissors, thermometer, bucket, plastic, rope, stove, crockmeter, and wooden stick. The equipment for physical testing includes a Tensile Strength Meter. Data collected were analyzed using ANOVA (Analysis of Variance), and if a significant effect was found, the analysis continued with Duncan’s multiple range test. The results showed that the type of mordant used had no significant effect (P > 0.05) on both tensile strength and elongation. The tensile strength values were 25.98 N/mm² (Epsom), 26.14 N/mm² (sodium acetate), and 27.27 N/mm² (acetic acid), while the elongation values were 69.81%, 67.05%, and 63.52%, respectively. In conclusion, the tensile strength and elongation of ecoprinted leather were not significantly affected by the type of mordant used. Although the tensile strength values met the Indonesian National Standard (SNI), the elongation values did not meet the sandart.