Vinification comes about thanks to yeasts which provoke alcoholic fermentation. taking about 15-20 days and is completed in stainless steel vats kept at a constant temperature of 18-20° C (65-68° F).Grapes coming from a single vineyard are usually vinified together and the wineries keep the different lots separate. The bubbles!, The technique of making the wine sparkling utilizes the charmat method, by a second fermentation in tank. The wine is then bottled under pressure to retain the sparkle. All of the bottles are green in colour to ensure that the wine is not damaged by light. After 30-40 days, the wine is ready to be released.