The process diagram illustrates how leather is produced through a series of industrial stages, beginning with delivery directly from farms and ending with waxing.
Overall, it is clear that skin undergoes multiple stages, including chemical treatments such as tanning, pickling, colouring and softening, before being finished into a commercial product.
First, raw animal skins are delivered from farms to the factory, where they are sorted according to their size. After that, the skins to remove unnecessary parts. In the next stage, salt is added to the material, and the skins are then cured for 30 days. Following the curing stage, the skins are soaked in water for between 12 and 24 hours. Next, the hair is removed from the animal skins using a knife in order to make future leather softer.
Following this, the skins are pickling, during which salt and acid are added. After pickling stage, the leather is tanned with chemicals for around 48 hours. The material is then coloured and softened with colour and oil before being dried using machine. Finally, the leather is waxed to improve its appearance and texture, resulting in the finished commercial product.