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
Abruzzo (wine) but only 21.5% of which is made under the "Denominazione di origine controllata" (DOC) designation. More than two-thirds of the region's wine is produced by co-operatives or sold in bulk to "negociants" in other Italian wine regions in Tuscany, Piedmont and the Veneto for blending. The most notable wine of the region is Montepulciano d'Abruzzo produced with the Montepulciano grape that is distinct from the Sangiovese grape behind the Tuscan wine Vino Nobile di Montepulciano. Together with Trebbiano d'Abruzzo, Montepulciano d'Abruzzo is one of the most widely exported DOC wine from Italy, particularly to the United States. While wine is