Technical cork stoppers
The cork oak tree is cultivated extensively in Portugal and its thick bark is extracted as cork which is used for a variety of purposes. Cork is flexible, compressible and the presence of suberin, which is its main constituent helps in restricting the passage of liquids and gases as a result of the presence of organic gases.
The cork which is obtained from the cork oak tree is available in plenty all over Portugal and has a wide variety of uses. But its most prominent use is in the form of cork stoppers used to cover the wine bottles and there are various different kinds of cork stoppers available for this purpose. Technical cork stoppers are specifically created for the sake of preserving those wines which are to be consumed within shorter periods of time like within a period of three to four years. The technical cork stoppers are comprised of agglomerated corks on the surface with natural cork disks being attached on its two sides. There can be various kinds of technical corks depending upon the placement of the disks. If the technical corks have a single disk attached on both sides it is referred to as the 1+1 technical corks, if there are two disks attached on one end, it is referred to as 2+0 technical corks and finally if there are two natural cork disks present then they are known as 2+2 technical corks. The technical corks have been found to be extremely hardy and efficient as wine closures and aid sufficiently in preventing untimely oxidation and also help in preserving the required Sulphur dioxide concentration within the glass containers. They are extremely hardy and are ideal as wine stoppers. The surface of the technical cork closures is agglomerated and they can be of various gradations according to the level of performance, the highest being A and the lowest being C.