Cork
Material
Cork is an impermeable buoyant material. It is the phellem layer of bark tissue which is harvested for commercial use primarily from Quercus suber, which is native to southwest Europe and northwest Africa. Cork is composed of suberin, a... Wikipedia
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Cork is the bark of an oak tree known botanically as QUERCUS SUBER. It is an evergreen which grows in commercial stands only in areas bordering the ...