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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.
Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay. The most common leathers come from cattle , sheep , goats, equine animals, buffalo, pigs and hogs, ostriches, and aquatic animals such as seals and alligators.
Bonier hides of Caiman crocodiles are more difficult to dye and work with, making them a less popular option. For items such as bags, suits or trousers, large panels of skin are required. [2] With large areas of leather on display, damaged leather is obvious which is why cautions are taken to ensure high-grade skins come out of the crocodile farms.
Shell cordovan, cordovan, or cordwain is a type of tanned leather commonly used in high-end shoemaking. Cordovan is an equine material made from the superficial fascia (or shell) of the lower layers of the hide on the rump of a horse. [1] The material derives its name from the city of Cordoba, Spain, which was long known as a center of leather ...
wetting back- semi-processed leather is rehydrated. sammying - 45-55%(m/m) water is squeezed out the leather. splitting - the leather is split into one or more horizontal layers. shaving - the leather is thinned using a machine which cuts leather fibres off. neutralisation - the pH of the leather is adjusted to a value between 4.5 and 6.5.
A hide or skin is an animal skin treated for human use. The word "hide" is related to the German word Haut, which means skin.The industry defines hides as "skins" of large animals e.g. cow, buffalo; while skins refer to "skins" of smaller animals: goat, sheep, deer, pig, fish, alligator, snake, etc. Common commercial hides include leather from cattle and other livestock animals, buckskin ...
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