EVALUATION OF THE PHYSICAL AND CHEMICAL QUALITY OF CHROME-TANNED BOX LEATHER AS SHOE UPPER MATERIAL BASED ON ISO 20942:2019. Settings Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit [Internet]. 2026 Jun. 30 [cited 2026 Aug. 6];25(1):31-43. Available from: https://e-jurnal.politeknikatk.ac.id/index.php/bptkspk/article/view/137