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ice beer
Ice beer is a marketing term for pale lager beer brands which have undergone some degree of fractional freezing somewhat similar to the German Eisbock production method. These brands generally have higher alcohol content than typical beer and generally have a low price relative to their alcohol content.〔
==Process==
The process of "icing" beer involves lowering the temperature of a batch of beer until ice crystals form. Since alcohol has a much lower freezing point (-114 °C; -173.2 °F) than water and doesn't form crystals, when the ice is filtered off, the alcohol concentration increases. The process is known as "fractional freezing" or "freeze distillation".〔(Popular Science )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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