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
Wine law governing the description and labeling of wines, and imports from non-EU countries. In addition to regulations that apply to all EU members, each EU country has its own framework of laws which govern aspects of winemaking such as the percentage of a grape to be included in a wine labeled with that variety name. For instance, in France wine professionals acribe to the Appellation d’Origine Contrôlée (AOC) system, which guarantees the origin of wine and other food products, such as cheese. In the United States, the wine laws are more flexible than European standards in regards to regulations on what