Leather is a material obtained from tanning the raw skin of animals, especially cattle. The tanning process transforms perishable skin into a stable, durable, and flexible natural material for a variety of applications. Leather and its combination with wood shaped the foundations of ancient technology. The leather and fur industries are different from each other. Skins and raw skins are also used in the manufacture of glue and gelatin. A flexible substance called leather is obtained from the combination of animal skin with various materials such as alum, bark fir, pine, oak, hazelnut, rubber, sumac, and other chemicals.