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Tanning, or hide tanning, is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed. Historically, vegetable based tanning used tannin, an acidic chemical compound derived from the bark of certain trees, in the production of leather. An alternative method, developed in the ...
A tanning worker in Morocco. The leather manufacturing process are the operations taken to create leather from hides. The procedure is divided into three sub-processes: preparatory stages, tanning, and crusting. All true leathers will undergo these sub-processes. A further sub-process, surface coating, may be added into the sequence.
An enormous amount of polluted water is discharged from the tanning process. Almost 90% of pollution of the leather industry comes from the tanning and pre tanning stages of production. [15] As a base calculation, tanning one ton of hide creates 20 to 80 cubic meters of polluted water. [11]
The hides soak while the drum slowly rotates about its axis, and the tanning liquor slowly penetrates through the full thickness of the hide. Once the process achieves even penetration, workers slowly raise the liquor's pH in a process called basification, which fixes the tanning material to the leather.
Horween Leather Company offers an array of tannages using primarily cowhide and horsehide, and also using smaller quantities of calf and bison hides. Its leather is used in a number of products including sports equipment, sports and casual footwear, bags, wallets, briefcases, belts, coats, jackets, and other apparel and accessories. [ 7 ]
A tanner treating leather in Morocco. Bating is a technical term used in the tanning industry to denote leather that has been treated with hen or pigeon manure, similar to puering (see puer) where the leather has been treated with dog excrement, and which treatment, in both cases, was performed on the raw hide prior to tanning in order to render the skins, and the subsequent leather, soft and ...
Tanned ostrich hide. Ostrich leather is distinct in its appearance and is characterized by raised points that are localized to the center of the hide. The portion with these bumps is called the "crown". It is actually the back of the ostrich where the animal's neck meets its body. The bumps are quill follicles where a feather grew. On the left ...
Whether the tanning process is done using vegetable tanning, chromium salt tanning or another process, solid and water waste are inevitable by-products. Currently, all hides used by S.B. Foot Tanning Company are pre-processed to a “wet-blue” state prior to delivery to the tannery for final tanning and dying.