Tanning Bed, May 2009 (brightened)
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)). * Physical punishment, metaphorically, such as a severe spanking which leaves clear marks See also *Skin whitening *Tan (color) *Tan (other) *Tannin (other) Tannin usually refers to astringent, bitter chemical compounds naturally occurring in plants, which are used in tanning hides and prominent in the taste of some red wines. It may also refer to: * Tannin, a monster in Levantine mythology See al ...

Tanning (leather)
Tanning is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed. Tanning hide into leather involves a process which permanently alters the protein structure of skin, making it more durable and less susceptible to decomposition and coloring. Before tanning, the skins are dehaired, degreased, desalted and soaked in water over a period of six hours to two days. Historically this process was considered a noxious or "odoriferous trade" and relegated to the outskirts of town. Historically, tanning used tannin, an acidic chemical compound from which the tanning process draws its name, derived from the bark of certain trees. An alternative method, developed in the 1800s, is chrome tanning, where chromium salts are used instead of natural tannins. History The English word for tanning is from medieval Latin , derivative of ( oak bark), from French (tanbark), from old-Cornish (red oak). These terms are ...
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