Maceration
The process by which grape skins remain in contact with the juice during or after fermentation, extracting colour, tannins, and flavour compounds.
In depth
Maceration is fundamental to red winemaking. Because colour pigments (anthocyanins) and tannins are found in grape skins rather than the juice itself, skin contact is essential for producing red wine. The duration and temperature of maceration are key tools the winemaker uses to control the body, colour intensity, and tannin structure of the final wine.
For lighter reds such as Pinot Noir or Gamay, winemakers may use shorter maceration (5–10 days) to avoid heavy tannins. For full-bodied reds like Barossa Shiraz or Barolo, extended maceration of 3–4 weeks or more builds structure and ageing potential.
In white winemaking, maceration is normally avoided to preserve freshness. However, extended skin contact in white wine production (called skin-contact or orange wine) is an increasingly popular technique that extracts tannins and phenolics, creating a distinctive wine style. Carbonic maceration, used for Beaujolais Nouveau, involves whole-bunch intracellular fermentation that produces soft, fruity wines with low tannin.
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Frequently asked questions
- Why is maceration only used for red wines?
- Maceration is used for red wines because colour and tannin are found in grape skins, not the juice. White wines are usually pressed immediately to avoid skin contact and preserve fresh aromatics. Orange wines are an exception — they use skin maceration intentionally.
- What is carbonic maceration?
- Carbonic maceration is a technique where whole uncrushed grapes are fermented in a CO₂-rich environment. Fermentation begins inside the grape cells, producing soft, fruity, low-tannin wines. It is most famously used for Beaujolais Nouveau.
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Practise questions on this topic
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