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Alternative Bottle Closures

Posted by Jim Van Bergen on 1/3/2014 to Wine Stoppers
Corked and UnCorked by jimvanbergen It's a New Year, and a dozen people have reached out to me regarding an NPR article about alternative bottle closures.

As the topic is constantly brought up, I thought it was time to discuss it here, and on JvBUnCorked. For those who aren't familiar with alternate enclosures, here's a quick tutorial, followed by my thoughts on the topic.

Traditional corks are made from bark of the cork oak (Quercus Suber). Since the cork is stripped from the tree, it is considered a sustainable practice. Most of the corks in the world come from Portugal and Spain.

Traditional corks are key to the development of the high end wines that improve significantly with age, but the inconsistencies of gas seepage on both sides of the cork is a major concern and the cork inconsistencies mean that you have no guarantee the expensive bottle is wonderfully developed and perfectly aged versus having developed into something undrinkable to be discarded.

Synthetic corks are made largely from plastics (making them recyclable but not biodegradable). They eliminate the possibility of TCA (actual cork taint) and can be useful in specifying an exact amount of gas that can travel through both sides of the cork. As they also maintain the classic cork removal ritual, these may offer the winemaker the best opportunity to replace actual cork as far as aging goes, but there are two major concerns:

1) some suggest that they require vertical, instead of horizontal, bottle storage to inhibit flavor transfer from the plastic, and

2) the concern that the porous nature of the plastic may over-oxidize the wine.

Synthetic Corks: Screw caps (aka stelvin caps) are aluminum caps with a captured plastic insert against the mouth of the bottle. These provide the best prevention from oxidation of the wine, but there is still public outcry against the use of what is considered a cheapening of both material and process, and in the case of some wines, the inability for bad aromas to escape the wine. So screw caps are currently ideal for wines designed to be enjoyed while young. They are quote commonly seen in wines from South Africa, Australia, New Zealand, and many German Mosels and Eiswines.

Screwcap -The Vino-Seal and Vinolok are trade names for glass & plastic stoppers. Like screw caps, they provide a total prevention from oxidation, but these enclosures usually cost more to source and require manual insertion. vino-seal-glass-cork-capsule-alternative-wine-closure.

The Zork is an Australian brand name for a modern enclosure that employs a combination of screw cap together with a plastic stopper insert, which can be used for both still and sparkling wines.

A 2005 study done by the American Society for Oenology and Viticulture demonstrated problems with cork inconsistencies and compared them to alternative enclosures, showing that 45% of corks have varying gas transmission properties. So it makes sense to keep developing improvements, at the same time insisting that the natural cork industry improve their consistency in quality. At the end of the day, we simply want wine that is worth what we've paid for it, and we don't wait the wine to be tainted or ruined in any way.

At small dinner parties, I love the ritual of removing the cork. But I often buy wines with screw caps and have no qualms about using them personally or serving them. As a matter of fact, for bigger parties and events I prefer screw caps over other enclosures to allow for speedy, immediate opening. Imagine having a full case of an expensive wine that had to be entirely opened prior to a dinner party, to find that only half the wines were used? The owner has to drink or share the wines or have them professionally re-corked if there is a desire to keep them. Some wines are simply going to be better when sealed by a screw cap to provide a wine as exact wine as possible when bottled. I have found Zorks, Vino-Seals and Vinoloks on bottles I purchased and they worked well; I have never had an issue or complaint with them.

But while I have yet to find a very pricey wine with a screw cap, while I often find older wines that are sealed first with cork, and then dipped in hot wax to provide a total seal. Removing the wax is often a messy challenge, and I find about half the waxed corks have disintegrated by drying out on the top side. wax To the traditionalists who decry alternative enclosures, I say humbug. I'd rather use any other method than to open a corked wine, to have a crumbled cork ruin the process of bottle opening, or find a ruined wine with a traditional cork. I don't care how we close it, as long as the wine inside is what we expect: delicious! votre santé! jimvanbergen

January 3, 2014 at 6:33 pm | Tags: alternative wine enclosures, cork, wine closures, Wine Commentary

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