The technical word is: alcoholic fermentation, one of the most important steps of winemaking.
What is alcoholic fermentation?
Grapes are pressed with their skin in big batches to create the alcohol. Sugars in grapes turn into alcohol thanks to the microscopic fungi called yeast.
Natural or artificial yeast?
Winemakers can choose to use only natural yeast and leave the result up to the nature or to introduce artificial yeasts to influence wine aromas.
To learn more about alcoholic fermentation and different steps of winemaking you can read our articles: “what are the steps of good red wine winemaking” and “Wine fermentation: is the winemaker a wizard apprentice?”
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