Closure types: oxygen, not prestige

The standard

The matched oxygen permeability judges a closure not by prestige but by whether its oxygen ingress suits the intended maturation.

Criteria

  • What matters is the oxygen permeability, not the material
  • A wine meant to age needs a different closure than one to drink young
  • Tightness over the years counts more than the initial state
  • Natural cork carries a fault risk of its own that other closures do not

Distinction

Closure type ≠ quality tier: a screwcap is no sign of lesser ambition but a decision about oxygen ingress. Closure type ≠ seal: the seal is one component of the closure, the closure type the whole principle. Only the matched oxygen permeability makes the choice a question of fact.