The diagram details the process by which leather products are made for retail. Looking from the overall perspective, it is clear that there are three primary stages in this entirely man-made procedure, starting with transporting the raw material to the factory, followed by preparing and processing it, and finally manufacturing consumer goods.
Firstly, the leather skins from various animals are dried. Subsequent to this, they are taken to a factory by truck where they are washed in water and lime. The skins are then soaked in more lime for a period of time before being run through a machine with large rollers that flattens them out.
Next, the flattened skins are soaked in tannin, which is composed of water and vegetable matter. They are then polished by another rolling device and taken to another factory by trucks. In this factory, the final products are crafted and available to consumer shops.