The drum is the typical machine for tannery: it consists in a cylinder rotating around its own axis, filled with water, tanning agents and skins. The drum used to be a simple wooden cylinder and has now transformed into a complex computer-controlled machine that regulates the input of water, the temperature, the speed of rotation, and the release of tanning agents.
Fédération Française
de la Tannerie Mégisserie
French Federation of Tanners