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
Great French Wine Blight unresolved today: whether self-rooted vines produce better wine than those that are grafted. There still exist some vines which have been neither grafted nor destroyed by phylloxera, including some owned by Bollinger. Great French Wine Blight The Great French Wine Blight was a severe blight of the mid-19th century that destroyed many of the vineyards in France and laid waste the wine industry. It was caused by an aphid (the actual genus of the aphid is still debated, although it is largely considered to have been a species of "Daktulosphaira vitifoliae", commonly known as grape phylloxera) that originated in North