Mikulovská wine grown in Mikulovská than any other Moravian region. The most planted red varieties are Saint Laurent ("Svatovavrinecké", 310 ha), Blaufränkisch ("Frankovka", 248 ha), Zweigelt ("Zweigeltrebe", 181 ha), and Pinot noir ("Rulandské modré", 172 ha). Plantings of Blauer Portugieser ("Modrý Portugal", 92 ha) has decreased rapidly, while Cabernet Sauvignon (89 ha) has increased. The Czech Wine Classification System, set in the Viticulture Act of 2004, is based on the sugar content of the grapes at harvest. Sugar content is measured using the Normalizovaný moštomer (°NM) scale, a measure of how many kilograms of sugar are in 100 litres of must. 1
Phenolic content in wine increase during ripening so does the concentration of anthocyanins. In most grapes anthocyanins are found only in the outer cell layers of the skin, leaving the grape juice inside virtually colorless. Therefore, to get color pigmentation in the wine, the fermenting must needs to be in contact with the grape skins in order for the anthocyanins to be extracted. Hence, white wine can be made from red wine grapes in the same way that many white sparkling wines are made from the red wine grapes of Pinot noir and Pinot Meunier. The exception to this is the small class of