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The thick, longitudinally cracked cork layers of the gray-brown trunk bark are characteristic of the cork oak. The cambium of the smooth bark of young trees forms a cork layer very early on, which can be 3 to 5 cm (1 + 1 ⁄ 4 to 2 in) thick. The light and spongy cork fabric shows vertical cracks and is white on the outside and red to red-brown ...
The Chinese cork oak is native to East Asia and is cultivated in a limited extent in China; the cork produced is considered inferior to Q. suber and are used to produce agglomerated cork products. [14] The so-called "cork trees" (Phellodendron) are unrelated to the cork oak, they have corky bark but not thick enough for cork production ...
Among the commercial products made from bark are cork, cinnamon, quinine [48] (from the bark of Cinchona) [49] and aspirin (from the bark of willow trees). The bark of some trees, notably oak (Quercus robur) is a source of tannic acid, which is used in tanning. Bark chips generated as a by-product of lumber production are often used in bark mulch.
Quercus variabilis, the Chinese cork oak, is a species of oak in the section Quercus sect. Cerris, native to a wide area of eastern Asia in southern, central, and eastern China, Taiwan, Japan, and Korea.
A French wine cork. A wine corks is a stopper used to seal a wine bottle.They are typically made from cork (bark of the cork oak), though synthetic materials can be used.. Common alternative wine closures include screw caps and glass stoppers. 68 percent of all cork is produced for wine bottle st
Quercus suber (cork oak) bark, Portugal. Commercial cork is derived from the bark of the cork oak (Quercus suber). Cork has many uses including wine bottle stoppers, bulletin boards, coasters, hot pads to protect tables from hot pans, insulation, sealing for lids, flooring, gaskets for engines, fishing bobbers, handles for fishing rods and tennis rackets, etc.
Oak wood chips are used for smoking foods such as fish, meat, and cheese. [87] [88] In Japan, Children's Day is celebrated with Kashiwa-mochi rice cakes, filled with a sweet red bean paste, and wrapped in a kashiwa oak leaf. [89] The bark of the cork oak is used to produce cork stoppers for wine bottles.
The cork oak is the only tree known that will allow this regular stripping of bark without damage. The harvest of one mature tree provides sufficient bark to produce about 4,000 wine bottle corks. The industry provides employment for about 60,000 workers.