Bordeaux wine almost universally used. Chaptalization is permitted, and is fairly common-place. Fermentation then takes place, usually in temperature controlled stainless steel vats. Next the must is pressed and transferred to barriques (in most cases) for a period of ageing (commonly a year). The traditional Bordeaux barrique is a 225 litre oak barrel. At some point between pressing and bottling the wine is blended. This is an integral part of the Bordeaux wine making process, as scarcely any Bordeaux wines are varietals; wine from different grape varieties is mixed together, depending on the vintage conditions, so as to produce a wine in
History of Bordeaux wine Bordeaux's most prestigious estates and Pierre de Rauzan laid the foundation for Château Rauzan-Ségla, Château Rauzan-Gassies, Château Pichon Longueville Baron, and Château Pichon Longueville Comtesse de Lalande. In 1855, a classification system was set up that ranked the top chateaus of the Médoc according to their market price. From 1875–1892 almost all Bordeaux vineyards were ruined by Phylloxera infestations. The region's wine industry was rescued by grafting native vines on to pest-resistant American rootstock from Augusta, Missouri, the first viticultural region in the United States. All Bordeaux vines that survive to this day are thanks to this action. Some grape