Characteristics of Oxygen Permeability in Wine Closures

Presented by Paulo Lopes PhD, University of Bordeaux - APCOR Cork Seminar - June 2006 - St. Helena CA

Summary : This study incorporates a colorimetric method for detecting oxidation, allowing more precise measurements of oxygen ingress than most previous work. Dr. Lopes demonstrates the comparative differences between wine closures in allowing oxygen ingress. His findings conclude that (1) Synthetics were too permeable – and caused premature aging (2) Screwcaps were not permeable enough – and did not allow proper aging. The implication was that natural cork offered a perfect balance.