Screwcap v Cork – the photographic evidence

What would happen if you bottled a Clare Valley Semillon under 14 different closures, including natural and synthetic corks and screwcap, and left them for 10 years? Would a simple photograph of unopened bottles tell a story? Certainly looks as though it does. The wine was made by Leasingham Estate and the study conducted by the Australian Wine Research Institute (AWRI). As the images show the wine under screwcap was the best preserved. But how did it taste? According to Peter Godden of AWRI "The wine under screw cap was classic aged Semillon and was wonderful to drink." Jamie Goode has blogged about the screwcap wine and the trial.

Screwcaps, corks and consumers

An interesting little study has been reported in ScienceNews from the spring meeting of the American Chemical Society. 2006 Pinot noir and Chardonnay from the Argyle Winery in Oregon were closed with natural cork, synthetic cork and three screw caps; the three screwcaps had a different lining. The chemical profile and dissolved oxygen content of the wine under each type of seal was examined at 6 month intervals over two years. In addition, volunteer tasters rated the flavor and aroma of the wines under the different closures. The conclusion? The synthetic cork and the cap lined with low-density polyethylene let in the most oxygen, but the tasters apparently could not detect any differences.