The first step in making fine brandies is to allow the fruit juice (typically grape) to ferment. This usually means placing the juice, or must as it is known in the distilling trade, in a large vat at 68-77°F (20-25°C) and leaving it for five days. During this period, natural yeast present in the distillery environment will ferment the sugar present in the must into alcohol and carbon dioxide. The white wine grapes used for most fine brandy usually ferment to an alcohol content of around 10%.