Extraction of Tannins Compound from Tingi Wood Bark Extract and It’s Aplication on the Tanner Snapper Fish (Green Jobb-fish) Skin

Abstract

The research objective is the extraction of tannins from tingi wood bark extract and it’s application on the tanning of green job-fish (Aprion virescens) skin as raw material for commercial leather products. The factor that is used as a source of treatment is concentration of  tingi bark extract with five treatments, respectively: 5.0% (a1) ; 7.5% (a2) ; 10.0% (a3) ; 12.5% ​​(a4) ; 15.0% (a5) (interval 2.5%) with three replications. Statistical methods used to analyze data is Variant Analysis and Least Significant Difference Test. Leaher quality parameters was observed that the thickness (mm), tensile strength (N/cm²), elongation (%), tear strength (N/cm), wrinkle temperature (ºC), enervation (mm), oil/fat content (%). The data were analyzed by analysis of variance and a real range test Duncan (Duncan Multiple Range Test / DMRT) 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 samples of treatment a1, a2, a3, a4, a5 respectively: 0.69 ; 0.61 ; 0.60 ; 0.69 ; 0.68 mm, Tensile strength: 639.75 ; 926.27 ; 923.13 ; 809.37 ; 753.51 N/cm², Elongation: 33.82 ; 35.70 ; 34.52 ; 38.10 ; 23.35%,Tear strength: 186.72 ; 341.37 ; 335.32 ; 431.39 ; 182.47 N/cm, Temperature wrinkle: 76.33 ; 76.00 ; 81.00 ; 83.33 ; 81,33ºC, Enervation: 1.79 ; 1.65 ; 1.72 ; 1.57 ; 1.75 mm, Oil/fat content: 6.70 ; 7.58 ; 7.95 ; 8.34 ; 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 a 12.5% ​​treatment of tingi bark extract liquid (a4) is the best treatment.

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