tanbark

　 　

WordNet

1. bark rich in tannin; bruised and cut in pieces to use for tanning; spent tanbark used as a ground covering
2. evergreen tree of the Pacific coast area having large leathery leaves; yields tanbark (同)Lithocarpus densiflorus

PrepTutorEJDIC

1. タン素(皮なめし用の樹皮)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/07/01 05:49:56」(JST)

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For other uses, see Tanbark, Lexington.

Workers peeling hemlock bark for the tannery in Prattsville, New York, United States.

Tanbark is the bark of certain species of tree. It is traditionally used for tanning hides into leather.

The words "tannin", "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 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

Waterwheel at Combe House Hotel in Holford, Somerset, England. The overshot waterwheel was cast by Bridgwater ironfounder H Culverwell & Co in 1892 to replace an earlier wheel. It was used to grind oak bark for the tannery complex established here in the 1840s by James Hayman. When the tannery closed in 1900 the waterwheel was adapted to other uses such as grinding grain for grist, cutting chaff, chopping apples for the cider press and generating electricity. It also cracked stones in a nearby quarry. The gearing survives too.

In Europe, oak is a common source of tanbark. Quercitannic acid is the chief constituent found in oak barks. The bark is taken from young branches and twigs in oak coppices and can be up to 4 mm thick; it is grayish-brown on the outside and brownish-red on the inner surface.

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 America, condensed tannins are also present in the bark of blackjack oak (Quercus marilandica). In New York, on the slopes of Mount Tremper, hemlock bark was a major source of tanbark during the 19th century.

Around the Mediterranean Sea, sumach (Rhus coriaria) leaves and bark are used.

In Africa and Australia, acacia (called "wattle") bark is used by tanners.

• Tool to recover bark from oak branches

• Recovery of bark from oak branches

• Another view of the process

• The bark of an oak tree

• Young red oak bark

See also

• Barkdust

References

External links

English Journal

• Comparative performance of playground surfacing materials including conditions of extreme non-compliance.

• Gunatilaka AH1, Sherker S, Ozanne-Smith J.
• Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention.Inj Prev.2004 Jun;10(3):174-9.
• OBJECTIVE: A recent case series study found that only 4.7% of 402 playgrounds in which arm fractures occurred in Victorian schools complied with the recommended 20 cm depth of tanbark. Tanbark depths at fall sites varied between 0-27 cm and the mean was 11.1 (5.0) cm. The purposes of the present stu
• PMID 15178675

• Effects of photochemical smog and mineral nutrition on ponderosa pine seedlings.

• Bytnerowicz A1, Poth M, Takemoto BK.
• Environmental pollution (Barking, Essex : 1987).Environ Pollut.1990;67(3):233-48.
• Two-year-old seedlings of ponderosa pine (Pinus ponderosa Dougl. ex Laws) were exposed to ambient concentrations of photochemical smog (AA) and clean air (CA) during a single field season at Tanbark Flat of the San Gabriel Mountains in the Los Angeles Basin. The seedlings were grown in a perlite-ver
• PMID 15092211

Related Links

• Tanbarkとは - goo Wikipedia (ウィキペディア)

Tanbark around the world [edit] 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 ...

• Tanbark | Define Tanbark at Dictionary.com

Tanbark definition, the bark of the oak, hemlock, etc., bruised and broken by a mill and used especially in tanning hides. See more. Dictionary.com Word of the Day Translate Games Blog Thesaurus.com Apps Favorites Log Out ...

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