The tanning companies utilize particular processes that require the mechanical and chemical intervention, to develop the technical characteristic consistent to the use and durability for a long period.
The main interventions are:
- Leather cleaning;
- Soaking, obtained through the help of digestive products;
- Hair elimination to make visible the below part, the derma, that represents the useful product for us;
- Liming, effected with chemicals and mechanical action;
- Fleshing to eliminate the below material of the leather identified by thickness and excessive fats;
- Tanning that gives, thanks to the use of chemicals, the steadiness to a product that, without a proper treatment, tends to quickly degrade;
- Shaving that gives thickness uniformity and cleaning to the leather through a mechanical process, making it similar to a fabric (for its touch feeling and handiness) and easily usable;
- Dying, finishing that provide the aesthetic characteristic exalting the physical qualities of the leather.

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There are different types of treatment, one of these is the activated sludge process that uses the principle of self-purification of water, in which microorganisms use the organic matter turning it into sludge.

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