Upon arrival, the bunches intended to produce the red wines of Châteauneuf du Pape are de-stemmed, i.e. the stem is removed, which could bring herbaceous flavors to the wines produced. The grains are then crushed: they are slightly opened in order to let the first juice escape.
Then they are distributed in the vats according to their origin and the appellation for which they are intended.
The vats of Châteauneuf du Pape are not mixed with the vats of Côtes du Rhône. By piling up, the grapes will continue to extract their juice. By bathing in it, the yeasts which are naturally on the skins will begin their work, that is to say transform the sugar contained in the juice into alcohol. This phenomenon will trigger a rise in temperatures, which any producer must be able to control quickly for several reasons:
- beyond 40°, the yeasts die and therefore the fermentation stops.
- too high temperatures deteriorate the aromas and colors.
In order to avoid this kind of problem, our tanks are equipped with a refrigeration system, which we can trigger as soon as the 30° threshold is reached.
For all producers, the vatting time for red wines varies according to the appellation. This can range from about a week for local wines, 10 to 15 days for Côtes du Rhône, to 15 to 25 days for Châteauneuf du Pape. During this period, we do “pumping over”: the juice is pumped from the bottom of the vat to be released on top. It is an essential operation for all producers to obtain a good homogenization, a good extraction, and it allows that the "hat" does not dry out.
Winemakers call the solid parts of the grape (skin and seeds) that float on the surface a “cap”, because it protects the juice from oxygen and bacteria in the air. Above all, it must not dry out: on the one hand to remain airtight, on the other hand to be able to be pressed at the end of vatting.
After pressing, this hat is called “marc”.
Grape marc vinified in Châteauneuf du Pape can be distilled to obtain Marc de Châteauneuf du Pape. Some producers can have their own marc distilled, as in Châteauneuf du Pape, other winegrowers send them to an industrial distillery. Fermentation stops naturally when the sugar level is less than or equal to 2 grams per liter of wine. The wine is then drawn and the marc pressed, and today free run wine and press wine are mostly blended. A second fermentation can then start: the malolactic fermentation. It lasts between a week and a month. This will be followed by rackings which allow a natural clarification of the wines. Depending on the choice of the producer in certain AOCs, or according to the rules of these AOCs, wines intended for aging, such as the red Châteauneuf du Pape, are aged in oak casks, in demi-muids or in vats for 6 to 18 months. , see more; the others will spend the winter in storage vats before being bottled the following spring.