Most fermentation are carried out in close tanks for 5-8 days ( ไวน์แดง ) Initially aerobic conditions are maintained for the cells to grow. Later anaerobic conditions are maintained foe fermentation t take place. It also prevent growth of aerobic spoilage organisms.
At the end of fermentation wine is removed and yeast cells are separated before they autolyse.
Pressing
When the winemaker feels that enough maceration has occurred. The must is moved from its fermentation containers for pressing. A variety of methods can be used, but barket pressing in the most common for high quility red wine production. Wine that will undergo ask treatment are moved to barrels at this point.