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
Sparkling wine on the wine label. For wines produced outside the EU, the sweetness level is not required but if it is included on the label the terms used must conform to EU guidelines. The most well-known example of sparkling wine is that of Champagne from the Champagne wine region of France. On average, Champagne is responsible for about 8% of worldwide sparkling wine production with many other regions emulating the "Champagne style" in both grapes used (generally Chardonnay, Pinot noir and Pinot Meunier) and production methods—sometimes referred to as the "Champagne method". French sparkling wines made according to the Champagne method