Tanning
Tanning
Tanning (/ˈtænɪŋ/) is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed.
Etymology
The term "tanning" comes from tannum (oak bark) that was used in the tanning process.
Process
Tanning involves a process which permanently alters the protein structure of skin, making it more durable and less susceptible to decomposition, and also possibly coloring it.
Types of Tanning
There are several types of tanning, including:
- Vegetable Tanning: This is the oldest method of tanning. It uses tannin, an acidic chemical compound from tree bark.
- Chrome Tanning: This method uses chromium salts, specifically chromium(III) sulfate.
- Aldehyde Tanning: This is the main type of tanning in modern use. It uses glutaraldehyde or oxazolidine compounds.
- Brain Tanning: This method uses animal brains or other fatty materials to alter the leather.
- Synthetic Tanning: This method uses aromatic polymers such as Novolac.
Related Terms
- Leather: A durable and flexible material created by tanning animal rawhide and skins.
- Hide (skin): The pelt or skin of an animal.
- Tannin: An acidic chemical compound used in tanning.
- Tannery: A place where the skins are processed.
See Also
External links
- Medical encyclopedia article on Tanning
- Wikipedia's article - Tanning
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