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
Italian wine last modification, which occurred in 2010, established four basic categories which are consistent with the last EU regulation in matter of wine (2008–09). The categories, from the bottom to the top level, are: A number of sub-categories exist pertaining to the regulation of sparkling wine production (e.g. Vino Spumante, Vino Spumante di Qualità, Vino Spumante di Qualità di Tipo Aromatico, Vino Frizzante). Within the DOP category, 'Classico' is a wine produced in the original historic centre of the protected territory. 'Superiore' is a wine with at least 0.5 more alc%/vol than its corresponding regular DOP wine and produced using a