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Is the volume of gas at the top of a beer bottle the same for all beers, and how is it optimised?
Ron Dippold
San Diego, California, US
I am a brewer, so this is dear to my heart. The unfilled area at the top of any container is known as headspace or ullage. In a beer bottle, it serves a couple of purposes. It prevents beer from squirting out when you put a cap on. It prevents the beer from breaking the cap seal and leaking out if the beer gets hot and the liquid expands. Since the space…
