The grapes are picked, how do we make this become wine? That has become the main objective now at Mas Coutelou.
The grape skins, pips, flesh and solids are with the juice in the tank (cuve) for as long as Jeff feels that they will benefit the juice. They give the juice chemicals such as anthocyanins which give colour to the juice (for rosé and red wines), tannins and flavour compounds. The solid parts of the mix tend to rise to the top of the tank and float on the juice. This cap must be kept moist, a dry must would give unpleasant flavours and is more prone to harmful bacteria. That is why remontage and pigeage have to be carried out, as explained before.
Jeff will taste from each cuve every day and samples are sent to oenologue Thierry Toulouse for analysis.
When he is happy that the right balance of sugars, acidity, colour and flavours is achieved it is time to press the wine. Some of the must is left behind in cuve and will be collected to use again, for example in distilling.
The pressed juice goes into a new cuve and will continue its fermentation into wine. The yeasts on the grape skins and in the atmosphere of the cellar change the grape sugars into alcohol. The fermentation will have begun when the must was in contact but will continue when just the juice remains.
I wish I could convey the smell of the fermenting juice via the page you are reading. It is like walking into a boulangerie in the early morning, bready aromas fill the air as the yeasts go about their work. One of the real highlights of the whole process.
Whilst that is all going on the equipment which has been used so much in the last month is checked over, taken apart and given a thorough cleaning. Not a pip, not a grape skin must be left in the sorting table, presses, égrappoir (destemmer) or anything else. No chance of bacteria gathering.
It is not straightforward. The process of grape juice to wine is a natural one and things can go wrong. Any vigneron who had a year where the process went without any hiccoughs would be either the luckiest alive or a liar. Yeasts can suddenly stop working, fermentations become too hot, bacteria (both helpful and harmful) are unpredictable. Jeff must be aware of every cuve and of their analyses, he must use his experience to tackle any issue which springs up at any time of day or night. He rejects the use of sulphur dioxide (SO2) to act as an antiseptic or stabiliser for the wine, therefore that experience is tested time and again. No wonder he wears an air of fatigue.