Advanced Winemaking

Pre-Fermentation Techniques

Winemakers make crucial decisions before fermentation even begins that significantly impact the final wine.

• Whole-bunch fermentation: including stems adds tannin and complexity (common in Burgundy)
• Cold soak (cold maceration): extracting color and flavor without alcohol, at cool temps
• Skin contact for whites: brief contact creates 'orange' wines with more texture
• Saignée: bleeding off juice from a red vat to concentrate what remains; the bled juice becomes rosé
• Sorting/selection: hand-sorting removes damaged berries for higher quality

Fermentation Choices

The vessel, temperature, and yeast selection all influence wine character.

• Stainless steel: neutral, temperature-controlled, preserves fruit
• Oak barrels: adds flavor, allows micro-oxidation, good for structured wines
• Concrete/clay eggs: neutral but allow micro-oxidation, gaining popularity
• Wild yeast: longer, unpredictable fermentations but potentially more complex flavors
• Temperature: cool (whites, 12–22°C) preserves aroma; warm (reds, 20–32°C) extracts color/tannin

Post-Fermentation & Aging

After primary fermentation, several processes can further shape the wine.

• Malolactic fermentation (MLF): converts malic → lactic acid; softens, adds buttery notes; standard for reds, optional for whites
• Lees aging (sur lie): contact with dead yeast adds richness, bread/biscuit notes (Muscadet, Champagne)
• Bâtonnage: stirring lees for more extraction
• Oak aging: new vs. old, French vs. American, toast level — all affect flavor
• Micro-oxidation: controlled oxygen exposure to soften tannins without barrel

Sparkling Wine Production

The method of creating bubbles fundamentally defines the style of sparkling wine.