The white must and a small part of the red wine are mixed. The resulting cuvée with added yeast cultures selected by Villa Sandi is then put into vessels where fermentation takes place at a controlled temperature of 15-16°C to enhance all the harvest fragrances. Upon reaching the required alcohol and sugar content fermentation is stopped by refrigeration. After being left for at least two months in contact with the yeasts, the sparkling wine is ready for bottling.