Brandy is made from early grapes in order to achieve higher acid concentration and lower sugar levels. Base wine generally contains smaller amount (up to 20 mg/l) of sulphur than regular wines, as it creates undesired copper(II) sulfate in reaction with copper in the pot stills. The yeast sediment produced during the fermentation may or may not be kept in the wine, depending on the brandy style. Brandy is distilled from the base wine in two phases. In the first, large part of water and solids is removed from the base, obtaining so-called "low wine", basically a concentrated wine with 28–30%
Sawdust brandy Sawdust brandy Sawdust brandy (from the German "Holzbranntwein") is a neutral spirit produced through the distillation of wood products. To produce sawdust brandy, the wood is cooked with a diluted sulfuric acid, which causes the cellulose to be broken down via acid hydrolysis into dextrose and other simple sugars, while the lignin remains. The acidic, sugar-containing liquid is neutralised and allowed to ferment, producing the ethanol that will later be purified through distillation. In the German Democratic Republic, the lye produced from the wood pulp was employed in the production of the "Holzschnaps" ("wood schnapps"). Brandy for human consumption (spirits