After main fermentation, these beers are bottled and ready to be drunk. This way, absence of refermentation allows a shorter brewing process.
Refermentation in the bottle is due to the addition of yeasts, and sometimes sugar, in the beer while bottling. Then beer is stored in a hot (68°F to 77°F) fermentation room for a few weeks before being sold.
Once begun, refermentation goes on during the conservation of the beer. Consequently taste and alcohol content evolve all along its ageing.
Because of the presence of yeast, you're likely to see a little sediment at the bottom of the bottle and beer can be a bit cloudy.
Brouette de Bières®, BP 95, 59163 Condé sur l'Escaut (France) - SARL company with a 9000 ¤ capital - RNCS Valenciennes 493 819 684
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