An alternative wine closing is a replacement closure used in the wine industry to seal wine bottles in lieu of traditional cork closures. The emergence of this alternative has grown in response to quality control efforts by wine makers to protect against "stain cork" caused by the presence of chemical trichloroanisole (TCA).
Closure of the debate, especially between supporters of screw cap and natural cork, has increased the awareness of post-bottling wine chemistry, and the concept of wine-making has evolved to continue after the bottling process, since closures with different oxygen transmission rates can cause different tastes when they reach consumers.
The cork-industry group APCOR cites a study that shows a 0.7-1.2% stain level. In a 2005 study of 2,800 bottles sampled at the Wine Spectator blind-tasting facility in Napa, California, 7% of the bottles were found stained.
Video Alternative wine closure
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Synthetic cork is made of a plastic compound designed to look and "pop" like a natural cork, but without the risk of TCA contamination. Synthetic cork losses include the risk of harmful air entering the bottle after as little as 18 months, the difficulty in removing it from the bottle, and the difficulty of using a cork to seal back the wine. James Laube of the Wine Spectator noted that some can also give a little taste of chemistry to wine.
Unlike natural corks, many synthetic corks are made from non-biodegradable materials but can be recycled as resin # 4 or # 7 identification codes. There are two main production techniques for synthetic wine closure: injection molding and extrusion. There are also methods that are claimed to incorporate two injection and extrusion techniques. A 2007 study by Victor Segalen Bordeaux 2 University showed that synthetic injection-molded corks enable the highest levels of oxygen permeation when compared to natural cork and screw caps, offering the lowest protection against oxidation of grapes.
A synthetic wine bottle cap allows the transfer rate of controlled oxygen, which affects sensory characteristics.
Maps Alternative wine closure
Close screw
The screw cap or "Stelvin cap" is a cover made only of aluminum material threaded to the bottleneck. They are the dominant closures used by Austrian, Australian and New Zealand wineries. This can be attributed to New Zealand screw lid initiatives that promote the use of screw caps instead of corks. Screw caps form a tighter seal and can hold oxygen longer than cork. These benefits help maintain the overall quality and potential of wine aging. Michel Laroche of Domaine Laroche noted that this played a role in his decision to adopt a screw cap. "Extensive quality tests show convincing results: in addition to protecting against cork stains, screws are also beneficial in wine aging, especially keeping the aromatic freshness."
A frequently quoted contradiction is an experimental case conducted by ChÃÆ' Â ¢ teau Haut-Brion in the 1970s, when 100 bottles were placed under screws for long-term observation. The result, according to Haut-Brion manager Jean-Bernard Delmas, "is that it works perfectly for the first ten years, until the plastic in the hat becomes brittle and lets air in."
The disadvantage of screw caps according to wine expert Jancis Robinson is the opposite of oxidation: reduction, which can suppress the aroma of wine and may cause unpleasant, a problem that mainly affects the Sauvignon blanc which is a grape varieties with a natural tendency towards reduction. In addition, there is a public image of screwcap, because "consumers still regard screwcaps as for 'cheap' wine (regardless of price tag)".
In a 2004 study of consumer opinion conducted by a wine consulting firm, Wine Intelligence found that nearly 52% of American consumers and 60% of British consumers rejected the idea of ​​using screws for their fine wine. The research of Victor Segalen University in Bordeaux in 2007 showed that the screw cap cover allows the lowest amount of oxygen permeation when compared to natural and synthetic corks, offering the highest level of protection against oxidation of grapes.
After a study by a clinic error at the International Wine Challenge in September 2006, it became widely reported in British newspapers that test results showed that one of 50 screwcap bottles, 200,000 bottles worldwide, may be affected by chemical sulphidation processes, resulting in defects. where consumers will be "faced with a sulfur smell - like burning rubber or rotten eggs - rather than an interesting bouquet". Jamie Goode presented the arguments to the reports he described as "representing poor closing science, filled with inaccuracies and misconceptions, and not serving the wine industry well," and discussing inaccuracies in certain respects.
Vino-Seal and Vinolok
Vino-Seal, also sold as Vinolok, is a plastic/glass cover originally developed by Alcoa and now manufactured by Czech crystal glass manufacturer Preciosa. Since its introduction into the European market in 2003, more than 300 wineries have utilized the closure. Using a glass stopper with an inert o-ring, this closure is claimed to create an airtight seal that prevents oxidation and TCA contamination. The closing loss is a relatively high cost for each plug (70 cents each) and manual bottling cost, or obtaining compatible bottling equipment.
Zork
Zork is an alternative wine closing for still wine, which seals like a screw cap and appears like a cork, made by an Australian company of the same name. The closure has three parts: an outer cap that provides a clear-tamper clamp that locks into the standard cork bottle mouth band; an inner metal foil that provides an oxygen barrier similar to a screw cap, and an inner thruster that creates 'pop' on extraction and reseals after use. Introduced in 2010, it was the first in-bottle, closing closure for sparkling wine.
Opposition
There is a continuing denial of the use of alternative closures in some parts of the wine making industry. In March 2006, the Spanish government banned the use of alternative wine closures in 11 Spanish wine producing regions as part of the D.O. (DenominaciÃÆ'³n de Origen) . regulations.
Although environmentalists mourn the loss of cork forests for commercial crops such as eucalypts, artificial cork supporters claim that "natural cork" is merely "dust and granules bound to solvents," and no more biodegradable than artificial products. "Granules and dust bound to the solvent" illustrates "a cork that clumps." This is different from the "natural cork" made of cork skin.
See also
- The wine box
- Dude
- Grape storage
- Cork material
References
External links
- The official website of New Zealand's Screw Cap Initiative
- "The History and Resurrection Screw" Wine of the Week webzine
Source of the article : Wikipedia
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