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All Journal JPM: JURNAL PENGABDIAN MASYARAKAT Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Nur Mutia Rosiati
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Journal : Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit

 1 
REPAIR OF OLD STOCK COW LEATHER UPPER SHOES USING REFINISHING TECHNIQUES Sofwan Siddiq Abdullah; Anggoro Tri Hatmanto; Nais Pinta Adetya; Nur Mutia Rosiati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 2 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Finished skin for a long time will accumulate, overgrown mold, unpleasant odor, folds occur, uneven color and potentially damaged skin. This study aims to increase the optimality use of cowhide upper shoe articles of old stock cattle by refinishing techniques. The advantage of refinishing is the shorter process time than reprocessing, wet processing and continues refinishing. The stages are sorting, grading, preliminary test, refinishing treatment and final testing. Materials used are three pieces of leather that consist fullgrain nappa, softy mill nappa and correctedgrain. Nappa softymill skin requires mechanical toggling treatment because there are fold defects. Fullgrain and correctedgrain nappa leathers are immediately refinished. The analysis was organoleptical and physical analysis. Physical tests involve tensile strength, elongation, tear resistance, wet and dry rubbing resistance [4]. The results of physical tests of tear strength, elongation and tensile strength show that refinishing does not change much about the character of leather. The results of physical tests of tear strength, elongation and tensile strength showed that refinishing doesn’t change the character of leather. The refinishing process successfully increases the rubbing resistance of both dry and wet paints and organoleptically improves the quality of leather.
RE-DYEING PROCESS ON CABRETTA SHEEPSKIN GOLF GLOVES TO IMPROVE COLOR FASTNESS USING ALIPHATIC POLYAMINE DERIVATE AS FIXING AGENT Wahyu Fajar Winata; Dwi Ari Setyorini; Nur Mutia Rosiati; Fauzi Ashari
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 23 No 1 (2024): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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This research aims to improve the color fastness of sheep Cabrera golf gloves during the post-tanning process. The post-tanning process includes aging, sammying, shaving, wetting back, re-tanning I, neutralization I, surface dyeing, fixation I, top dyeing, fixation II, neutralization II, fatliquoring, and top fatliquoring. Fastness skin color can be repaired by reprocessing the dyeing process. The raw material used is three sheets of crust-dyed sheep cabretta article of reject quality with a thickness of 0.5-0.55 mm. The chemicals used in the research were H₂O, Foryl PKN, Ammonia, Nexopol AM, Nexopol LA, Formic Acid (FA), Busan 30WB, and Dermafix P Liquid. The post-tanning process using FC fixing material produces crust-dyed sheep cabretta articles with a high color fading, and the finished leather has low rubbing resistance. The test results on crust-dyed skin samples showed that the fading that occurred was very high in the sweat solution, indicated by the solution's color following the sample's color. Reprocessing using Dermafix P Liquid reduced color fading in the sweat solution. On finished leather, dry and wet rubbing resistance was increased to a value of 5 for dry rubbing and a value of 4 for wet rubbing after reprocessing using Dermafix P Liquid, where previously the dry fastness value was 3, and the damp fastness value was 2 in the initial sample. Based on the results obtained, it can be concluded that reprocessing by replacing fixation materials and adding other necessary ingredients can produce leather of better quality and by SNI standards.
Co-Authors Anggoro Tri Hatmanto Baskoro Ajie Dwi Ari Setyorini Emiliana Anggriyani Fadzkurisma Rabbika Fauzi Ashari Laili Rachmawati Mustafidah Udkhiyati Nais Pinta Adetya Ragil Yuliatmo Sofwan Siddiq Abdullah Swatika Juhana Wahyu Fajar Winata