The picture describes how people make leather from animal skin.
Overall, the process comprises a number of steps, beginning with the collection of raw materials, through some different chemical-used stages, and ending with the waxing of the finished leather.
At the beginning of the process, animal skin is collected and transported to a factory, after which it undergoes sorting based on its size into small and large pieces. After subsequently being trimmed to ensure that any excess material is fully removed, the trimmed skin is preserved with the application of salt in the fourth step.
The process continues with the skin being cured for 30 days before being soaked in water for 12 to 24 hours in order to soften it. Once the soaked skin is cleaned by removing any remaining hair using a knife, it is then subjected to a pickling stage, at which point it is treated with salt and acid inside a rotating drum. Following this, the skin undergoes a tanning process involving chemical treatment, which lasts for 48 hours to further strengthen the material. In the final steps, the tanned leather is colored and soften using various oils before being dried. The dried leather is then waxed to produce a smooth finish, completing the entire process.