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In addition, some nitrogen dissolves in the beer, which also contains dissolved carbon dioxide. Oxygen is generally excluded as its presence can cause flavour deterioration. The presence of dissolved nitrogen allows smaller bubbles to be formed, which increases the creaminess of the head.
The creamy head on beers such as Guinness is created by a widget in cans or bottles using nitrogen, or by the process of drawing keg beer from a keg using nitrogen or mixed gas (carbon dioxide and nitrogen). The use of nitrogen, which was pioneered by Guinness, creates a firm head with small bubbles while reducing the excessively acidic taste ...
The bottle then enters a "filler" which fills the bottle with beer and may also inject a small amount of inert gas (CO 2 or nitrogen) on top of the beer to disperse oxygen, as O 2 can ruin the quality of the product by oxidation. Next the bottle enters a labelling machine ("labeller") where a label is applied.
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The draught beer's thick and creamy head comes from mixing the beer with nitrogen and carbon dioxide. [4] The company moved its headquarters to London at the beginning of the Anglo-Irish trade war in 1932. In 1997, Guinness plc merged with Grand Metropolitan to form the multinational alcoholic-drinks producer Diageo plc, based in London.
Some beers may be served with a nitrogen/carbon dioxide mixture. Nitrogen produces fine bubbles, resulting in a dense head and a creamy mouthfeel. [131] In the 1980s, Guinness introduced the beer widget, a nitrogen-pressurised ball inside a can which creates a moderately dense, tight head. This approximates the effect of serving from a keg, at ...
Kilkenny is available on tap in a number of Australian and New Zealand bars and pubs, where it is served, as with locally brewed draught Guinness, on a mixture of 70% nitrogen and 30% carbon dioxide through a special tap to render a creamy head. It is available in 470ml cans from some bottle stores. [3]
The carbon dioxide fights to return to its original gas state, which is why soda and other carbonated beverages are bubbly. It’s also why any carbonated drink goes flat when left open for a ...