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
European Union wine regulations European Union wine regulations European Union wine regulations are common legislation related to wine existing within the European Union (EU), the member states of which account for almost two-thirds of the world's wine production. These regulations form a part of the Common Agricultural Policy (CAP) of EU, and regulate such things as the maximum vineyard surface allowed to individual EU member states, allowed winemaking practices and principles for wine classification and labelling. The wine regulations exist to regulate total production in order to combat overproduction of wine and to provide an underpinning to Protected designations of origin (PDOs), among other