Wine color practice of saignée (exposing wine to red grape skins for only a short period of time in order to give it a lighter feel closer to that of white wine) or by blending a white wine with a red wine. The presence of a complex mixture of anthocyanins and procyanidins can increase the stability of color in wine. As it ages, the wine undergoes chemical autoxidation reactions involving acetaldehyde of its pigments molecules. The newly formed molecules are more stable to the effect of pH or sulfite bleaching. The new compounds include pyranoanthocyanins like vitisins (A and B), pinotins and
Swiss wine Other grapes grown in Switzerland include hybrid varieties like Muscat bleu which had in cultivation for commercial winemaking 2009. For a long time, Switzerland lacked detailed national regulations regarding wine classification, which meant that it was to a large extent up to wine producers about what to put on wine labels; neither a German wine-style Prädikat system or a French wine-style appellation system was implemented, and as a non-EU member, Switzerland did not have to implement European Union wine regulations. Wines were usually labelled by their village of origin, by grape variety, or using a brand name. From the late