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Wine is an alcoholic beverage made from fermented grapes or other fruits. The natural chemical balance of grapes lets them ferment without the addition of sugars, acids, enzymes, water, or other nutrients.[1] Yeast consumes the sugars in the grapes and converts them into alcohol and carbon dioxide. Different varieties of grapes and strains of yeasts produce different styles of wine. The well-known variations result from the very complex interactions between the biochemical development of the fruit, reactions involved in fermentation, terroir and subsequent appellation, along with human intervention in the overall process.

Your First Wine from Fresh Grapes
Nothing feels as satisfying and authentic as making your first batch of wine from fresh grapes. And there’s no better time to try it than in early autumn, when grapes all over the country are ripening in vineyards and backyard gardens.
There are many kinds of grapes to choose from, depending on where you live.Other options include ordering grapes through your favorite local wine making shop or from a produce wholesaler.
Whatever kind of grapes you use, the general techniques, equipment and ingredients are the same. Here’s an overview of some key steps along the way.
Basic Winemaking Equipment
Here’s everything you need to make your first one-gallon batch of wine from fresh grapes. You should be able to find this equipment at any homebrewing or home winemaking supply shop.
• Large nylon straining bag
• Food-grade pail with lid (2 to 4 gallons)
• Cheesecloth
• Hydrometer
• Thermometer
• Acid titration kit
• Clear, flexible half-inch diameter plastic tubing
• Two one-gallon glass jugs
• Fermentation lock and bung
• Five 750-ml wine bottles
• Corks
• Hand corker
Inspecting the Fruit
Winemaking starts with inspecting the grapes. Make sure they are ripe by squishing up a good double handful, straining the juice and measuring the sugar level with a hydrometer, a handy device you can buy at a winemaking supply shop. The sugar density should be around 22° Brix – this equals 1.0982 specific gravity or 11 percent potential alcohol – and the fruit should taste sweet, ripe and slightly tart.
The grapes also must be clean, sound and relatively free of insects and other vineyard debris. Discard any grapes that look rotten or otherwise suspicious. Also, it’s very important that all the stems are removed, since they will make your wine bitter.
Keeping it Clean
Winemaking demands a sanitary environment. Wash all of your equipment thoroughly with hot water, boiling what you can. It’s also wise to arm yourself with a strong sulfite solution to rinse any equipment that comes in contact with your wine. To make it, add 3 tablespoons of sulfite powder (potassium metabisulfite) to a gallon of water and mix well.
Adjusting the Juice
Adjusting the juice or “must” of your wine is critical. Luckily, it’s also easy. Acid content is measured with a simple titration kit; you can buy one at a supply shop. The ideal acid level is 6 to 7 grams per liter for dry reds and 6.5 to 7.5 grams per liter for dry whites.
Here’s an example: If your must measures 5.5 grams per liter, then you need to add 1 gram per liter of tartaric acid to bring it up to 6.5 g/L. Since 0.2642 gallons equals 1 liter, 1 g/L is equivalent to adding 3.8 grams of tartaric acid to your one-gallon batch. Add this powder in one-eighth teaspoon intervals, checking acidity carefully after each addition, until the desired level is reached. You can buy tartaric acid at your supply shop.
You also need to monitor the sugar level with your hydrometer. The must should be about 22° Brix for both reds and whites. To bring the sugar concentration up, make a sugar syrup by dissolving one cup sugar into one-third cup of water. Bring it to a boil in a saucepan and immediately remove from heat. Cool before adding in small amounts, one tablespoon at a time, until the desired degrees Brix and specific gravity is reached. To lower the sugar level, simply dilute your must or juice with water.
The temperature of your must can also be adjusted to provide the perfect environment for yeast cells. Warming up the juice gently (don’t cook or boil it!) is an easy way to bring it to pitching temperature without damaging the quality of the wine. Fermentation can sometimes reach into the 80° to 90° F range, though the 70° F range is standard for reds (whites often are fermented at cooler temperatures).
If your grapes have been refrigerated or are too cold, use this unorthodox but quick trick: Heat up a small portion of the juice in the microwave, mix it back into the fermentation pail and re-test the temperature. An electric blanket wrapped around the fermentation pail also works, but takes longer. For cooling, add a re-usable ice pack and stir for a few minutes. Pitch the yeast when the temperature reaches 70° to 75° F for reds and 55° to 65° for whites.
Racking the Wine
“Racking” means transferring the fermenting wine away from sediment. You insert a clear, half-inch diameter plastic hose into the fermenter and siphon the clear wine into another sanitized jug. Then top it off and fit it with a sanitized bung and fermentation lock. This can be a delicate operation and it’s important to go slowly. You don’t want to stir up the sediment, but you don’t want to lose your siphon suction.
Bottling the Batch
Bottling may sound complicated, but it’s really not. To bottle your wine, you simply siphon your finished product into the bottles (leaving about 2 inches of headspace below the rim), insert a cork into the hand corker, position the bottle under the corker and pull the lever. It’s always wise to buy some extra corks and practice with an empty bottle before you do it for real.
Wine bottles can be purchased at home winemaking stores, or you can simply wash and recycle your own bottles. These supply stores also rent hand-corkers and sell corks. You should only buy corks that are tightly sealed in plastic bags because exposure to dust and microbes can spoil your wine. Corks can be sterilized just before bottling, with hot water and a teaspoon of sulfite crystals.
A one-gallon batch will yield about five standard-size (750 ml) bottles of wine. If the fifth bottle isn’t quite full, then either drink that bottle or use smaller bottles to keep the wine. The key is to have full, sealed containers that are capable of aging.
Now you’re ready to make your first batch of fresh-grape wine. Below you’ll find step-by-step recipes for a dry red and a dry white table wine. The recipes have similar steps and techniques, with one important difference. Red wines always are fermented with the skins and pulp in the plastic pail; the solids are pressed after fermentation is complete. White wines are always pressed before fermentation, so only the grape juice winds up in the fermenting pail.
Dry Red Table Wine
Ingredients
• 18 lbs. ripe red grapes
• 1 campden tablet (or 0.33g of potassium metabisulfite powder)
• Tartaric acid, if necessary
• Table sugar, if necessary
• 1 packet wine yeast (like Prise de Mousse or Montrachet)
1. Harvest grapes once they have reached 22 to 24 percent sugar (22° to 24° Brix).
2. Sanitize all equipment. Place the grape clusters into the nylon straining bag and deposit the bag into the bottom of the food-grade pail. Using very clean hands or a sanitized tool like a potato masher, firmly crush the grapes inside the bag. Crush the campden tablet (or measure out 1 teaspoon of sulfite crystals) and sprinkle over the must in the nylon bag. Cover pail with cheesecloth and let sit for one hour.
3. Measure the temperature of the must. It should be between 70° and 75° F. Take a sample of the juice in the pail and measure the acid with your titration kit. If it’s not between 6 to 7 grams per liter then adjust with tartaric acid.
4. Check the degrees Brix or specific gravity of the must. If it isn’t around 22° Brix (1.0982 SG), add a little bit of sugar dissolved in water.
5. Dissolve the yeast in 1 pint warm (80° to 90° F) water and let stand until bubbly (it should take no more than 10 minutes). When it’s bubbling, pour yeast solution directly on must inside the nylon bag. Agitate bag up and down a few times to mix yeast. Cover pail with cheesecloth, set in a warm (65° to 75° F) area and check that fermentation has begun in at least 24 hours. Monitor fermentation progression and temperature regularly. Keep the skins under the juice at all times and mix twice daily.
6. Once the must has reached “dryness” (at least 0.5° Brix or 0.998 SG), lift the nylon straining bag out of the pail and squeeze any remaining liquid into the pail.
7. Cover the pail loosely and let the wine settle for 24 hours. Rack off the sediment into a sanitized one-gallon jug, topping up with a little boiled, cooled water to entirely fill the container. Fit with a sanitized bung and fermentation lock. Keep the container topped with grape juice or any dry red wine of a similar style. After 10 days, rack the wine into another sanitized one-gallon jug. Top up with dry red wine of a similar style.
8. After six months, siphon the clarified, settled wine off the sediment and into clean, sanitized bottles. Cork with the hand-corker.
9. Store bottles in cool, dark place and wait at least six months before drinking.
Red wine is fermented with the pulp and skins. This “cap” will rise to the top, so you need to “punch it down” frequently with a sanitized utensil.
Dry White Table WineIngredients
• 18 lbs. ripe white grapes
• 1 campden tablet (or 0.33g of potassium metabisulfite powder)
• Tartaric acid, if necessary
• Table sugar, if necessary
• 1 packet wine yeast (like Champagne or Montrachet)
1. Harvest grapes once they have reached 19 to 22 percent sugar (19° to 22° Brix). Pick over grapes, removing any moldy clusters, insects, leaves or stems.
2. Place the grape clusters into the nylon straining bag and put into the bottom of the food-grade plastic pail. Using very clean hands or a sanitized tool like a potato masher, firmly crush up the grapes inside the nylon bag.
3. Crush the campden tablet (or measure out one teaspoon of sulfite crystals) and sprinkle over the crushed fruit in the bag. Cover pail and bag with cheesecloth and let sit for one hour.
4. Lift the nylon straining bag out of the pail. Wring the bag to extract as much juice as possible. You should have about one gallon of juice in the pail.
5. Measure the temperature of the juice. It should be between 55° to 65° F. Adjust temperature as necessary. Take a sample of the juice in the pail and use your titration kit to measure the acid level. If it is not between 6.5 and 7.5 grams per liter, then adjust with tartaric acid as described above.
6. Check the degrees Brix or specific gravity of the juice. If it isn’t around 22° Brix (1.0982 SG) adjust accordingly.
7. Dissolve the packet of yeast in 1 pint warm (80° to 90° F) water and let stand until bubbly (no more than 10 minutes). When it’s bubbling, pour yeast solution directly into the juice. Cover pail with cheesecloth, set in a cool (55° to 65° F) area and check that fermentation has begun in at least 24 hours. Monitor fermentation progression and temperature at least once daily.
8. Once the must has reached dryness (at least 0.5 degrees Brix or 0.998 SG), rack the wine off the sediment into a sanitized one-gallon jug, topping up with dry white wine of a similar style. Fit with a sanitized bung and fermentation lock. Keep the container topped with white wine. Be sure the fermentation lock always has sulfite solution in it. After 10 days, rack the wine into another sanitized one-gallon jug. Top up with wine again.
9. After three months, siphon the clarified wine off the sediment and into clean, sanitized bottles and cork them.
10. Store bottles in cool, dark place and wait at least three months before drinking.

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