Head Space

Appears in

Oxford Companion to Wine

Oxford Companion to Wine

By Jancis Robinson

Published 2006

  • About

head space, that space in a container holding a liquid that is not taken up by that liquid. In wine containers it is often called the ullage, or ullage space. In large, modern wineries, the head space of stainless-steel tanks is often deliberately filled by an inert gas as a preservative measure. Similarly, many modern bottling lines use inert gas to exclude oxygen from the head space.