Wine research body slams plastic packaging

By Guy Montague-Jones

- Last updated on GMT

New research from the Institute of Vine and Wine Sciences (ISVV) suggests white wines stored in plastic packaging remain fresh for only six months.

Glass is still the dominant force in wine packaging but new formats such as the bag-in-box and PET bottles are gaining in popularity.

This has sparked debates about the merits of different options that the ISVV aimed to settle with a three year study into the influence of packaging on wine preservation.

Rémy Ghidossi, lecturer at the ISVV, said, “It is now necessary to establish the truth, based on scientific information and quantitative data, to determine the legitimacy of each package.”

In pursuit of this goal, the ISVV examined how red and white Bordeaux wine changed over time when kept in glass, single-layer PET, multi-layer PET, and bag-in-box formats.

At regular intervals over a period of one year researchers measured the level of gases (oxygen, carbon dioxide, and sulpher dioxide) contained in the wine. A physical analysis of the colour was also carried out along with a sensory analysis with both expert and novice tasters.

The ISVV said the character of the white wine changed noticeably after six months when stored in single-layer PET, multi-layer PET, and bag-in-box.

Chemical changes

The wine research body said the chemical analysis revealed that plastic packaging allowed oxygen to penetrate after six months, with a major reduction in carbon dioxide. Levels of sulphur dioxide, which helps prevent refermentation and microbial growth, also dropped significantly.

The ISVV said these chemical changes translated into sensory changes – the jury of tasters agreed that the wine tasted of “rotten fruit”.

As for red wine, some initial signs of deterioration were observed in plastic packaging after six months but the ISVV said it is too soon to draw any definite conclusions. An 18-month analysis is now planned in order to build on initial findings.

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2 comments

In many countries half the wine packaged in plastic

Posted by Q Stallcup,

95% of wine is consumed within six months of bottling. 90% of wine is consumed within 72 hours of purchase. In many countries half the wine is sold in BIB which is a plastic container covered in corrugated. In terms of product quality plastic is a non issue, and far less of a problem than cork taint or the real energy cost of glass recycled or otherwise.

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WHAT BARRIER MATERIALS WERE USED

Posted by David Colahan,

I am interested to know if the barrier technology used was an active Oxygen scavenger or a passive barrier system.

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