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Tanbark is the bark of certain species of tree. It is traditionally used for tanning hides.〔Chapter 8 - Tannins: Major Sources, Properties and Applications. Antonio Pizzi, Monomers, Polymers and Composites from Renewable Resources 2008, Pages 179-199, 〕 The words "tanning", "tan," and "tawny" are derived from the Medieval Latin ''tannare'', "to convert into leather." Bark mills are horse- or oxen-driven or water powered edge mills〔(cslib.cdmhost.com )〕 and were used in earlier times to shred the tanbark to derive tannins for the leather industry. A "barker" was a person who stripped bark from trees to supply bark mills. ==Tanbark around the world== In some areas of the United States, such as northern California, tanbark is often called "mulch," even by manufacturers and distributors. In these areas, the word "mulch" may refer to peat moss or to very fine tanbark. In California, ''Lithocarpus densiflorus'' (commonly known as the ''tanoak'' or ''tanbark-oak'') was used. In New York, on the slopes of Mount Tremper, hemlock bark was a major source of tanbark during the 19th century. In America, condensed tannins are also present in the bark of blackjack oak (''Quercus marilandica').〔Flavan and procyanidin glycosides from the bark of blackjack oak. Young-soo Bae, Johann F.W. Burger, Jan P. Steynberg, Daneel Ferreira and Richard W. Hemingway, Phytochemistry, Volume 35, Issue 2, January 1994, Pages 473-478, 〕 Around the Mediterranean Sea, sumach (''Rhus coriaria'') leaves and bark are used. In Africa and Australia, acacia (called "wattle") bark is used by tanners. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「tanbark」の詳細全文を読む スポンサード リンク
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