Tannin Compound Extraction of Tingi Wood Bark and Its Aplication on the White Snapper Skin Tanning (Green Jobb-fish) as a Raw Material of Leather Creative Product

Abstract

The research objective is the extraction of tannins from tingi wood bark and its application on the tanning of white snapper skin (green jobb-fish) as a raw material for commercial leather products. The factor that used as a source of treatment is concentration of  tingi wood bark extract with 5 treatments, respectively: 5.0% (a1), 7.5% (a2), 10.0% (a3), 12.5% ​​(a4) and 15.0% (a5) (interval 2.5%) with 3 replications. Leaher quality parameters was observed consist of: Thickness (mm), Enervation (mm), Elongation (%), Tensile strength (N/cm²), Tear strength (N/cm), Wrinkle temperature (ºC) and Oil/fat content (%). The data were analyzed by analysis of variance and a real range test Duncan (Duncan Multiple Range Test) at a significance level of 95% and processed with SPSS version 18.Based on the observations of a tanned leather sample, it is known that the Thickness value of the tanners snapper leather samples of treatment a1, a2, a3, a4 and a5 respectively: 0.60, 0.61, 0.60, 0.69 and 0.68 mm ; Enervation: 1.79, 1.65, 1.72, 1.57 and 1.75 mm ; Elongation: 33.82, 35.70, 34.52, 38.10 and 23.35 % ; Tensile strength: 639.75, 926.27, 923.13, 809.37 and 753.51 N/cm² ; Tear strength: 186.72, 341.37, 335.32, 431.39 and 182.47 N/cm ; Wrinkle temperature: 76.33, 76.00, 81.00, 83.33 and 81.33 ºC ; Oil/fat content: 6.70, 7.58, 7.95, 8.34 and 7.87 %. Based on the results of the overall analysis, all quality parameters to according the quality requirements SNI 06-4586-1988 about freshwater snake leather tanned chrome, with a4 treatment (12.5% of tingi wood bark extract) ​​is the best treatment.

Keywords: concentration, extract, tannin, quality, leather, tingi wood bark, white snapper