The Effects of Concentration from Mimosa and Formalin Tanner Materials Mixture on the Tanned Black Tilapia Leather Quality

Abstract

This research aims to determine the quality of tilapia leather tanned using tanning material mixture that is mimosa-formalin and determine the best concentration that can be applied in the fish leather tanning industry. Research using a Completely Randomized Design (CRD) 1 (one) factor (the mixture of mimosa and formalin) with 4 treatments and 3 replications treatment are a1 (mixture of 5% mimosa and 4% formaline), a2 (mixture of 5% mimosa and 6% formaline), a3 (mixture 7.5% mimosa and 4% formaline) and a4 (mixture of 7.5% mimosa and 6% formaline). The data obtained were tested using multiple comparison (Least Significant Different, LSD). The parameters were Tensile strength (N/cm²), Elongation (%), Tear strength (N/cm), Softness (mm), Wrinkle temperature (°C), Water content (%) and Oil/fat content (%). The results showed that the mixture of mimosa and formalin hasn’t significant effect on Tensile strength, Elongation, Tear strength, Softness and Wrinkle temperature but differs with the parameters of Water content and oil/fat content. The average value of the parameters meet the quality requirement of SNI 06-4586-1998 about freshwater snake leather that chrome tanning, while the parameters of softness, water content and elongation didn’t met standards. Treatment 4^th (a4) is the best treatment because it produced the most excellent quality on every parameter that the tensile strength of 1,537.14 N/cm², elongation of 69.68 %, tear strength of 301.50 N/cm, softness of 2.15%, wrinkle temperature of 79.06 ⁰C, water content of 18 %, and fat/oil content of 2.69 %.

Keywords: formalin, mimosa, black tilapia, leather, quality, tanning