Alfasol red wine yeast enables making red wine with fruity smell and taste. Working method: Fast Optimum operating temperature: Between 20 - 30 degrees. Alcohol tolerance: 15.5% Fermentation time 2 weeks Red wine yeast dosage: 3 gr per 10 liters of grape must. Note: On average, 1 teaspoon of red wine yeast weighs 1.3 g.