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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.
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.
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 ...
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]
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.
Self Tanning Wipes for a Mess-Free Application: Tan Towel Self Tan Towelette These wipes come individually packaged and pre-soaked with the self tanning formula to help make the process that much ...
Early 20th century currier's knife manufactured by Nicolai Clasen, Hamburg, Germany. A currier is a specialist in the leather-processing trade.After the tanning process, the currier [1] applies techniques of dressing, finishing and colouring to a tanned hide to make it strong, flexible and waterproof. [2]