
Cork is the bark of Sobreiro, a noble tree that grows in Mediterranean regions such as Portugal, Spain, Italy, France, Morocco and Algeria. It survives an average of 150 to 200 years, despite the many stripping that it has done throughout its existence. The first cork is removed at the age of 30, and after every nine years. Each harvest is 160,000 tons. After harvesting by hand, the cork dries for 12 months, and passes through boiling water at 98 ° to remove impurities. The largest pieces and without defects, turn into pure and natural quality cork stoppers , extracted with a drill the size of a cork stopper. All the material discarded from the natural stopper, is crushed, granulated and compressed in tubes to be cut, and become another type called technical stopper. Cork has unique and unrivaled qualities such as: lightness liquid and gas impermeability elastic and compressible thermal and acoustic insulation slow combustion very resistant to friction (Use Google translate – original in Portuguese.)

Source: Tips and advantages to decorate the house using wine corks | Pitacos and Findings
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