A legal trademark (short name RD, English Recently Disgorged) of the champagne house Bollinger reserved for this. This was introduced around the year 1960 by the former head of the house Christian Bizot (1928-2002). The "RD" and exact date on label testifies that the concerned champagne "Recently disgorged". However, the essential thing is not the relatively imprecise notion of the recent disgorging (as every champagne was sometime degorgiert), but that so declared champagne especially long before the dégorgement was stored and thus the fine yeasts were particularly long in contact with the wine.
A so-declared champagne with a maturity of at least eight years (until in extreme cases, 50 years) is in very good vintages and also uses only the best wines (Année Rare RD). Normally, a champagne is to be enjoyed as soon as possible after it has come on the market. The Dégorgement date is intended as information in this regard. However, long years of champagne do not lose quality over the years. The indication of the Dégorgement date takes place in the meantime also from some other champagne houses; see below Mise en cave,
A detailed description of sparkling wine production is available at champagne, Complete listings of the numerous cellar techniques, as well as the wine-regulated wine, sparkling wine and distillate types are under winemaking contain. Comprehensive information on wine law is available under the keyword wine law,