Neck Trimming Shape Effect on Salt Cured Goat Skin Towards Wrinkle Defects, Final Yield Area, and Yield Loss of the Pickled Skin

Abstract

Goat skin has strong, flexible fibers, but not all parts of the goat skin have the same fiber structure. The neck has loose collagen fibers and irregular directions, making it susceptible to folds or wrinkles during tanning. The purpose of this study was to determine the most effective neck cutting pattern in preventing wrinkle defects on the surface of the skin, yield area and yield loss of skin, to find the optimal combination between defect prevention and increasing the efficiency of goatskin production. The study was conducted on nine salt-cured goatskins with an area of 33.5 sqf from PT Budi Makmur Jayamurni, Yogyakarta. Skin is grouped into 3 categories, namely, namely TT = without neck cutting, TP = cutting the base of the neck, and TU = cutting the U-shaped neck. The research method used a Completely Randomized Design (CRD), followed by Duncan's Multiple Range Test. The results of the analysis of variance showed significant differences between the TU treatment and TP and TT for all parameters. The TT treatment resulted in an average wrinkle defect area of 0.58 ± 0.14 sqf, a yield area of 114.34 ± 1.05%, and a yield loss (yield gain) of -16.35 ± 4.43%. The TP treatment resulted in a wrinkle defect of 0.33 ± 0.14 sqf, a yield area of 113.37 ± 0.89%, and a yield loss (yield gain) of -13.37 ± 0.90%. The TU treatment resulted in a wrinkle defect of 0.18 ± 0.07 sqf, a yield area of 123.89 ± 3.47%, and a yield loss (yield gain) of -23.89 ± 3.47%. The U-shaped cutting pattern yielded optimal results with the smallest wrinkle defect and a fairly large yield area.