UTILIZATION OF CHROME-TANNED LEATHER SHAVING AND BUFFING WASTE AS RAW MATERIALS FOR KEYCHAINS USING POLYURETHANE ADHESIVE. Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit , [S. l.], v. 25, n. 1, p. 23–30, 2026. DOI: 10.58533/fd38aa61. Disponível em: https://e-jurnal.politeknikatk.ac.id/index.php/bptkspk/article/view/138. Acesso em: 6 aug. 2026.