Precision enology is being used to make increasingly well-defined wines.
In this context, the lowering of SO2 doses, which is being made necessary for health and quality reasons, must not negatively impact the bottle aging of wine. Closure choice affects the maintenance of SO2 levels over time, with a direct consequence on
the wine’s oxidative or microbiological evolution. Winemaking trends for age-worthy wines are therefore tending towards the use of impermeable closures. A test involving accelerated aging was therefore set up. It involves the use of half-bottles (37.5 cl) and various storage temperatures. Traditional cork closures were compared with Diam® closures.