Raw Animal Hides; Raw materials like animal hides are essential in the leather production process. Salted hides, such as salted cow hides, sheepskin, and goat skins, are preserved for tanning. Wet blue leather, a semi-processed leather, is used by tanneries to create finished leather products. These materials are crucial for manufacturers who require high-quality raw materials to produce leather goods such as shoes, bags, and upholstery.