SUBSTITUTION OF ACID AND REACTIVE DYESTUFF MATERIALS IN THE WET BLUE SHEEP SKIN DYEING METHOD FOR NAPA LEATHER AND SUEDE GARMENTS ON WATER WASHING RESISTANCE AS A LABORATORY MANAGEMENT EFFORTS. Settings Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit . 2025;24(1):22-28. doi:10.58533/p9ck7k13