With the advent of non-detectable TCA guarantees in natural cork, the issue of closure performance is now more than ever centred on the ability of different stoppers to manage the passage of oxygen into a wine. And, while a hermetic seal may be the ultimate goal for a white wine made from aromatic grapes that is designed to be drunk young, low levels of exposure to oxygen may actually benefit other types of wine, particularly reds made from naturally reductive grape varieties such as Pinot Noir or Syrah.

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Source: Thedrinksbusiness.com