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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.
Some leather sold as "buckskin" may now be sheepskin tanned with modern chromate tanning chemicals and dyed to resemble real buckskin. Traditionally, Native American Indians would scrape away the excessive fat clinging to the hide, and this would be followed by working the raw hide with the brain tissue of an animal. [1]
Chrome-tanned leather is tanned using chromium sulfate and other chromium salts. It is also known as "wet blue" for the pale blue color of the undyed leather. The chrome tanning method usually takes approximately one day to complete, making it best suited for large-scale industrial use. This is the most common method in modern use.
The oldest confirmed leather tanning tools were found in ancient Sumer and date to approximately 5000 BCE. [5] The oldest surviving piece of leather footwear is the Areni-1 shoe that was made in Armenia around 3500 BCE. Another, possibly older, piece of leather was found in Guitarrero Cave in northern Peru, dating to the Archaic period. [2]: 340
Tanning may refer to: Tanning (leather), treating animal skins to produce leather; Sun tanning, using the sun to darken pale skin Indoor tanning, the use of artificial light in place of the sun; Sunless tanning, application of a stain or dye to the skin (active ingredient in tanning lotion products is dihydroxyacetone (DHA)).
Growing Thunder Fogarty's works are created with seed bead, and organic materials such as horse hair, brain-tanned leather, earth pigments, and other natural materials. Her dolls are finely detailed and embody tribal specific and familial significant designs.
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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. retanning - additional tanning agents are added to impart properties. dyeing - the leather is coloured.