A legal trademark (short name RD, English recently disgorged) of the Champagne House Bollinger reserved for this. This was introduced around 1960 by the former head of Christian Bizot (1928-2002). The "RD" and exact date on label testifies that the person concerned champagne Was recently disgorged. The important thing here is not the relatively imprecise term of the recent disgorging (because every champagne was disgorging at some point recently), but that a champagne declared in this way is particularly long before dégorgement was stored and the fine yeast additives were in contact with the wine for a particularly long time.
A champagne declared in this way with a maturation period of at least eight years (up to 50 years in extreme cases) will only be very good vintages produced and only the best wines (Année Rare RD) were used. Champagne can usually be enjoyed as soon as possible after it has been launched. The dégorgement date is intended as information in this regard. Champagne that has been stored on the lees for a long time hardly loses quality over the years. In the meantime, the dégorgement date is also given by some other champagne houses; see under Mise en cave,
A detailed description of sparkling wine production can be found at champagne, Complete lists of the numerous cellar techniques, as well as the wine, sparkling wine and distillate types regulated by wine law are included winemaking contain. There is extensive wine law information under the keyword wine law,