Commercial bock-style beer was frozen using two proposed freeze-down technologies: rapid separation of ice from the liquid phase, and technology of liquidphase draining from ice. Each technology was used in two temperature variants: –15°C and –84°C. As a result of freezing process, two fractions of equal volume of eisbock and ice were obtained from each sample. They were analyzed for real extract, bitterness and ethyl alcohol content. The purpose of the study was to evaluate the freezing technology used and to determine the changes in chemical composition and loss caused by freezing, during the production of eisbock beer. The degree of beer thickening by the rapid separation of ice from the liquid phase was small, and the loss of the constituents of beer was close to 50%. Higher increase in density of extract, the bitter compounds and the alcohol (close to 150%) was achieved by the liquid phase draining from ice.
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