Maceration is the period during winemaking when grape solids—principally skins, and sometimes seeds and stems—remain in contact with the juice or fermenting must. This contact extracts colour, tannins, aroma compounds and flavour. The duration, temperature, vessel and handling method influence the style and structure of the finished wine.
For most red wines, the juice ferments in contact with the skins to extract colour and tannin. Longer or warmer maceration can increase extraction, although the result depends on grape variety and winemaking technique. Rosé wines may receive a short period of skin contact before pressing, but many are made by direct pressing with minimal maceration. Most conventional white wines are pressed before fermentation, limiting skin contact.
When white grapes ferment or macerate with their skins for an extended period, the wine may develop deeper colour, tannin and a more textured palate. These wines are often called orange wines or skin-contact whites. The term “orange wine” describes a style, not a specific grape variety or appellation.
Carbonic maceration is a red-winemaking technique in which whole grape bunches ferment in a carbon-dioxide-rich environment, encouraging intracellular fermentation within intact berries. It can produce fresh, fruit-forward wines with softer tannin. Cold maceration is another technique used before or during fermentation to influence extraction, but practices vary.
Example: a red Pinot Noir may undergo controlled skin maceration for colour and gentle tannin extraction, while an orange wine may ferment on white-grape skins for days or weeks.
Key distinction: Maceration is skin or solid contact; fermentation is the conversion of sugar to alcohol. They may occur at the same time, but they are not the same process.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
