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
French wine we know today. In 1935, numerous laws were passed to control the quality of French wine. They established the Appellation d'origine contrôlée system, which is governed by a powerful oversight board (Institut national des appellations d'origine, INAO). Consequently, France has one of the oldest systems for protected designation of origin for wine in the world, and strict laws concerning winemaking and production. Many other European systems are modelled after it. The word "appellation" has been put to use by other countries, sometimes in a much looser meaning. As European Union wine laws have been modelled after those of the French,