HOME / PRESENTATIONS / WINE AND ITS MANUFACTURING: FROM VINE TO VINTAGE
Wine and Its Manufacturing: From Vine to Vintage
Introduction: The Art and Science of Wine Making
Wine is one of the world’s oldest fermented beverages, made primarily from grapes. The process of wine manufacturing—vinification—is both a traditional craft and a modern science. At its core, it’s about transforming grape juice into alcohol through fermentation.
Yeast consumes the sugar in grapes and produces ethanol, carbon dioxide, and heat, resulting in wine.
1. Classification of Wines
Wines are broadly categorized based on fermentation method, alcohol content, and ingredients.
Still Wines
- Alcohol: 9–15% by volume
- Types:
- Red: Fermented with grape skins
- White: Fermented without skins
- Rosé: From red grapes (brief skin contact), blending, or pressing
Sparkling Wines
- Includes Champagne (Méthode Champenoise)
- Undergo secondary fermentation in the bottle
- Categories: Brut (dry), Sec (medium), Demi-sec (sweet), Doux (very sweet)
Fortified Wines
- Alcohol is added to increase strength (15–22% ABV)
- Examples: Sherry, Port, Madeira
Aromatised Wines
- Infused with herbs, spices, and roots
- Must contain 14.5%–22% alcohol
- Examples: Vermouth, Barolo Chinato
2. Wine Manufacturing Process
2.1 Harvesting
- Done when grapes are physiologically ripe
- Sugar content should be 5–25% total soluble solids (TSS)
- Timely harvesting is critical for final quality
2.2 Crushing and Pressing
- Crushing converts grapes into “must” (juice + skin + seeds)
- Modern crushers reduce oxidation and microbial contamination
- Pressing separates juice from solids
2.3 Fermentation
- Must is fermented in temperature-controlled tanks
- Natural or added yeasts convert sugar into alcohol
- Duration: 1 to 5 weeks
- Small-batch = higher quality, hand-controlled
- Large-scale = more automated and formulaic
2.4 Clarification
- Removes solids through:
- Filtration (from coarse to sterile)
- Fining (using agents like bentonite or egg whites)
2.5 Aging and Bottling
- Wines are aged in:
- Stainless steel tanks
- Wooden barrels (barriques)
- Ceramic vats
- Bottles
- Aging affects flavor, mouthfeel, and color
3. Factors Affecting Wine Quality
Conclusion: Wine Making Is a Balanced Dance of Biology, Chemistry, and Tradition
From vineyard to bottle, every step in the wine manufacturing process requires:
- Scientific precision
- Clean processing conditions
- Consistent quality control
Wine manufacturers looking to expand operations or enter premium, export-quality markets benefit from working with an experienced food industry consultant or food processing consultant to:
- Design fermentation and aging protocols
- Choose equipment for artisan or automated setups
- Ensure FSSAI and international compliance
- Reduce batch variability and enhance product shelf life
Frequently asked
What sugar level should grapes reach before we harvest for wine?
For wine manufacturing, grapes are harvested when physiologically ripe, with sugar content in the range of 5–25% total soluble solids (TSS). Timely harvesting is critical because it directly determines final wine quality. Picking too early or too late shifts the sugar available to yeast during fermentation and therefore the alcohol and character of the finished wine.
What is the difference between red, white and rosé in terms of processing?
In still wines, which run 9–15% alcohol by volume, the difference lies in skin contact. Red wine is fermented together with the grape skins, white wine is fermented without skins, and rosé is made from red grapes with only brief skin contact, or by blending, or by pressing. The processing decision, not just the grape, defines the style.
How long does wine fermentation take, and what controls it?
Wine fermentation runs from 1 to 5 weeks. The must is fermented in temperature-controlled tanks, where natural or added yeasts convert sugar into alcohol, releasing ethanol, carbon dioxide and heat. Small-batch production is hand-controlled and generally yields higher quality, while large-scale production is more automated and formulaic.
What are the options for clarifying wine before bottling?
Clarification of wine removes suspended solids by two routes: filtration, which can range from coarse through to sterile grades, and fining, using agents such as bentonite or egg whites. Both are applied after fermentation and before aging and bottling, and clean processing conditions at this stage are essential to consistent product quality.
Does the choice of aging vessel really change the product?
Yes. Wine may be aged in stainless steel tanks, wooden barrels known as barriques, ceramic vats, or in bottles, and the vessel affects flavour, mouthfeel and colour. Sparkling wines such as Champagne made by the Méthode Champenoise undergo their secondary fermentation in the bottle itself, so vessel selection is a genuine process decision.
What alcohol strengths define fortified and aromatised wines?
Fortified wines have alcohol added to raise strength to 15–22% ABV, with Sherry, Port and Madeira as examples. Aromatised wines are infused with herbs, spices and roots and must contain 14.5%–22% alcohol, examples being Vermouth and Barolo Chinato. These strength bands distinguish them from still wines at 9–15% by volume.
DOWNLOAD
Download / View →
CITE THIS
PMG Engineering. (2021). Wine and Its Manufacturing: From Vine to Vintage. PMG Engineering. https://pmg.engineering/Presentation/8/wine-and-its-manufacturing-from-vine-to-vintage/