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Monthly Archives: July 2017

12 Steps to Making Wine from White Grapes

 

sauvignon blanc_chile_musto wine grape_winemaker_winemaking

Making Wine from White Grapes

1. Sanitize and Crush and Destem – Inspect your grapes and remove any moldy clusters. Crush and destem into clean and sanitized food grade plastic tubs. Always rinse your receiving vessel with a sanitizing strength potassium metabisulfite solution (2oz/gallon or 3tbsp/gallon). Make sure that the sanitizing solution touches all the surfaces of the vessel and that the vessel is completely emptied out of all sanitizing solution after. Shake free any drops as best you can from the vessel. Having remaining sulfite liquid in the vessel will prohibit fermentation. Do not rinse the sanitizer off with water after sanitizing as that will reintroduce bacteria to the environment.

2. Once all of the grapes are crushed, try to accurately measure your quantity of must. Add ¼ tsp of potassium metabisulfite for every 5 gallons of must that you have. Mix up the must thoroughly.

3. Wait for 2 hours after the sulfite addition and then add pectic enzyme to the must. Musto Wine Grape offers generic pectic enzyme or Cinn Free pectic enzyme that is specifically designed for white wine grapes. Follow the directions for the individual type of enzyme. Always mix it with water to create a 10% solution (if you use 5mls of enzyme, mix it with 45mls of water). The water allows it to better circulate throughout the must. Allow the pectic enzyme to work for 6 hours before pressing.

4. Press the Must – Wash the press and sanitize using potassium metabisulfite. Again, make sure the press does not have an excessive puddles or lingering amounts of sanitizing solution remaining. Sanitize the receiving container for fermentation (carboy, tank, demijohn, barrel) and any pumps or tubing that you may use. Anything that comes in contact with the wine should be rinsed with sulfite sanitizing solution. Place a screen or mesh (also sanitized) inside of the press to hold back any extra skins or seeds from getting through. Start by scooping up the must and placing it in the press. Some of the liquid will immediately flow through; this is the “free run”. When the press is full, slowly begin pressing. Do not try and press every last drop out of the must as this can lead to seed cracking and bitterness in the wine. Fill each container to within 6 inches of the top, to allow room for fermentation. This process will cause the juice to foam up and generate gas, therefore volume.

5. After pressing the grapes, mix the container thoroughly and take and record your measurements. Measure Brix, pH, and TA. If you need to adjust your juice at all, this is the time to do it. Ideally your Brix should be between 21-26 degrees, the pH between 3.2-3.5, and the TA between 6.5-8.5g/L. Your initial Brix reading, multiplied by .55, will give you a close estimate of your ending alcohol by volume percentage.

6. If you would like to use fermentation tannins (FT Blanc) or fermentation nutrients such as Opti-White, add them after measurements and adjustments have been made. Musto Wine Grape packages FT Blanc and Opti-White in small packs for 5 gallon batches. Mix any of these ingredients in thoroughly.

7. After measurements have been taken and any adjustments have been made, it is time to set yeast if you are using a cultured yeast strain. Use 1gram/gallon of wine must. Follow the yeast set directions on the packet explicitly and/or see the separate “Yeast Set” instructions.

8. After you atemperate and add your yeast, cover your tank with a floating lid or your carboy or demijohn with an airlock. An air lock will allow the carbon dioxide to escape the container without additional air getting in to oxidize the wine.

9. Stir the juice every other day to re-suspend the yeast and nutrients. Keeping the yeast in suspension is important to give it access to sugar and nutrients and to avoid the production of H₂S.

10. If you are using additional yeast nutrients to assist in fermentation you will add them after fermentation has started. Fermaid O is added at the beginning of fermentation (1 day after yeast set) and all others (BSG yeast nutrient, Fermaid K, AnchorFerm) will be added at 1/3 depletion of the Brix (2/3 of the beginning amount of Brix). Follow the directions for the individual yeast nutrient, hydrating with water and mixing thoroughly.

11. If you are adding malolactic cultures to your wine (Chardonnay), you may also chose to do this at 1/3 Brix depletion. If using a malolactic nutrient (Opti-Malo Plus) with the bacterial culture, hydrate the nutrient in a separate container from the bacteria and add to the must directly before the addition of the bacteria. Follow all directions on the bacteria and nutrient packets explicitly.

12. Monitor the progression of the juice by taking daily hydrometer readings. Using a sanitized wine thief or syringe, pull a sample of fermenting wine that is large enough to fill the hydrometer cylinder. Always sanitize the hydrometer and the cylinder before taking a reading. Look to the meniscus of the wine surface in relation to the hydrometer for the most accurate reading. When the wine is fermented to dryness (0.90 Specific Gravity), is has completed its primary fermentation. Allow the lees particles to settle, and then rack the wine into a sanitized container. Be sure that the container is filled within ½” of the top to prevent air exposure. At this point, it is imperative to add ¼ tsp of potassium metabisulfite per 5 gallons of wine. The sulfites will kill off any harmful microbes and prevent the wine from oxidizing.

The Winemaker’s Think Tank: Vol 24 – 5 Cost Effective Tips to Help you Save Money in Your Winemaking

What’s the Winemaker’s Think Tank?

Every Thursday we will post about a few frequently asked questions that our winemaker has answered. If you have a winemaking question you would like to have answered, please email us at support@juicegrape.com and we will try to get into next week’s post. Cheers! :)

Red wine from good grapes is fermented very nice

Cost Effective Tips to Help you Save Money in Your Winemaking

1. Alternative Varietals – Most winemakers aspire to make a big, bold Cabernet Sauvignon or supple Merlot. While these grapes make excellent world class wine, they are not the only varietals that can give you these results. Call your grape supplier and ask for a list of varietals that they can source for you. Do some research on lesser known varietals such as Carignane, Cinsault, Grenache, or Gamay. Perhaps making one of these varietals in the style of your preferred varietal, will yield some satisfactory, and more cost effective results.

2. Reusing Barrels Safely and Effectively – Barrels contribute two factors to wine: oak flavor and a round mouthfeel. While the first few vintages aged in the barrel will be bursting with oak flavor, over time, the oak flavor will dissipate from the barrel, rendering it neutral. While the barrel may not be able to contribute a lot of flavor to the wine, it will still add an important reductive character through micro-oxidation. Wine will still continue to evaporate out of the barrel and yield a creamier, smoother mouthfeel. If the winemaker desires more oak flavor, oak may be added to the barrel in the form of chips, staves, spirals, or cubes. This method will allow the winemaker to keep using the barrel for many vintages, rather than replacing them when the oak flavor diminishes.

3. Oak Alternatives – Barrels have much of the visual “romance” associated with winemaking, however they can be a very costly investment. For a new home winemaker making smaller batches, it may not even be feasible to get a small enough barrel. Rather than putting the wine into a barrel, why not put the “barrel” into the wine? Oak is now available toasted in the same way a barrel would be and in a variety of forms and sizes. In each form, it will deliver oak flavor to the wine, some shapes having more surface area and acting more quickly, whereas other shapes may take longer to infuse flavor. These are a very cost effective and efficient way of imparting oak flavor to wine.

4. Involve Friends – As your home winemaking progresses, often times winemakers want more sophisticated processing and analytic equipment. While a Destemmer/Crusher or a Bladder Press may last you many years, it is a costly initial investment. One way to help defray the cost of the equipment is to purchase it with other winemakers. If you have friends who also make wine or can network through a wine appreciation society, you can find other vintners who may be willing to split the cost of the machines with you. This can turn crushing and pressing into a party! Not only will the cost be divided, but so will the labor. Another way to try and reduce the cost of equipment is to try and purchase used equipment. Keep an eye on Craig’s List and wine classifieds for pieces of equipment someone wants to part with. Also, a local winery may have some equipment that they no longer use as they have scaled up and they jump at an opportunity to sell it rather than allowing it to collect dust.

5. Increase Production – As with many item in life, buying in bulk is more cost effective. Speak with your local grape broker to see if they offer volume discounts. If you have formed a winemaking group to share equipment costs, then perhaps you can get a better price on grapes if you purchase together, rather than separately. The same idea applies to corks and bottles. Buying larger quantities, provided you have adequate storage space, will save you money.

We hope this information helps with your winemaking. If you have any follow up questions or winemaking questions in general, please email us at support@juicegrape.com.

13 Steps to Making Red Wine from Grapes

13 Steps to Making Red Wine from Grapes 

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1. Sanitize and Crush and Destem – Inspect your grapes and remove any moldy clusters. Crush and destem into clean and sanitized food grade plastic tubs, stainless steel tanks, or glass carboys or demijohns. Always allow an extra 20% of volume for fermentation purposes as the wine will “expand” throughout fermentation. Always rinse your fermentation vessel with a sanitizing strength potassium metabisulfite solution (2oz/gallon or 3tbsp/gallon). Make sure that the sanitizing solution touches all the surfaces of the fermentation vessel and that the vessel is completely emptied out of all sanitizing solution after. Shake free any drops as best you can from the fermentation vessel. Having remaining sulfite liquid in the vessel will prohibit fermentation. Do not rinse the sanitizer off with water after sanitizing as that will reintroduce bacteria to the environment.

2. Once all of the grapes are crushed, try to accurately measure your quantity of must. Add ¼ tsp of potassium metabisulfite for every 5 gallons of must that you have. Mix up the must thoroughly.

3. Wait for 6-8 hours after the sulfite addition and then add pectic enzyme to the must. Musto Wine Grape offers generic pectic enzyme or Color Pro pectic enzyme that is specifically designed for red wine grapes. Follow the directions for the individual type of enzyme. Always mix it with water to create a 10% solution (if you use 5mls of enzyme, mix it with 45mls of water). The water allows it to better circulate throughout the must. Allow the pectic enzyme to work for 12 hours before yeast set.

4. Twenty four hours after crushing the grapes, mix the container thoroughly and take and record your measurements. Measure Brix, pH, and TA. If you need to adjust your must at all, this is the time to do it. Ideally your Brix should be between 23-28 degrees, the pH between 3.4-3.7, and the TA between 6-7g/L. Your initial Brix reading, multiplied by .55, will give you a close estimate of your ending alcohol by volume percentage.

5. If you would like to use fermentation tannins (FT Rouge, oak dust) or fermentation nutrients such as Opti-Red, add them after measurements and adjustments have been made. Musto Wine Grape packages FT Rouge and Opti Red in small packs for 5 gallon batches. If using oak dust, use 1/4cup for every 5 gallons of must. Mix any of these ingredients in thoroughly.

6. After measurements have been taken and any adjustments have been made, it is time to set yeast if you are using a cultured yeast strain. Use 1gram/gallon of wine must. Follow the yeast set directions on the packet explicitly and/or see the separate “Yeast Set” instructions.

7. After you atemperate and add your yeast, you may cover the vessel lightly with an old sheet or towel or place the lid gently on top of the bucket, if an airlock is in place. An air lock will allow the carbon dioxide to escape the pail without additional air getting in to oxidize the wine.

8. Obtain a must punch tool, a long stainless steel spoon, or your bare hands, and sanitize your tool or hands with sulfite sanitizer. This is what you will use to “punch down” or mix up the must three times a day. Try to mix everything very well, pushing all of the skins back down to the bottom, getting them very wet, and bringing up the piqued from the bottom. This should be done as often as possible, preferably three times a day. [Before work (7am), after work(5pm), and before bed (10pm)] When punching down every evening, take a sample of the liquid and using your hydrometer, track the Brix depletion. You should notice a drop in Brix daily.

9. If you are using additional yeast nutrients to assist in fermentation you will add them after fermentation has started. Fermaid O is added at the beginning of fermentation (1 day after yeast set) and all others (BSG yeast nutrient, Fermaid K, AnchorFerm) will be added at 1/3 depletion of the Brix (2/3 of the beginning amount of Brix). Follow the directions for the individual yeast nutrient, hydrating with water and mixing thoroughly.

10. If you are adding malolactic cultures to your wine, you may also chose to do this at 1/3 Brix depletion. If using a malolactic nutrient (Opti-Malo Plus) with the bacterial culture, hydrate the nutrient in a separate container from the bacteria and add to the must directly before the addition of the bacteria. Follow all directions on the bacteria and nutrient packets explicitly.

11. Punch down and take Brix measurements daily. When your hydrometer reads 0.90, you have fermented to dryness. At this point your malolactic fermentation may still continue, but the primary alcoholic fermentation is complete. You may now press the wine. Wash the press and sanitize using potassium metabisulfite. Again, make sure the press does not have an excessive puddles or lingering amounts of sanitizing solution remaining. Sanitize the receiving container (carboy, tank, demijohn, barrel) and any pumps or tubing that you may use. Anything that comes in contact with the wine should be rinsed with sulfite sanitizing solution. Place a screen or mesh (also sanitized) inside of the press to hold back any extra skins or seeds from getting through. Start scooping up the must and placing it in the press. Some of the liquid will immediately flow through, this is the “free run”. When the press is full, slowly begin pressing. Do not try and press every last drop out of the must as this can lead to seed cracking and bitterness in the wine. Fill each container to within ½” of the top and secure a bung and airlock in place. Malolactic fermentation will exude a small amount of carbon dioxide and there will be trapped gas within the wine that will need to escape the container.

12. Allow the wine to sit for 2-3 weeks. You can conduct malolactic chromatography or bring a sample to a winemaker at Musto Wine Grape for analysis to ensure that your secondary fermentation is finished. At this point you should see a nice thick layer of lees in the bottom of the carboy or demijohn. You will want to place the full vessel onto an elevated surface such as a table and place the new, sanitized, empty vessel on the floor below. Using a sanitized siphon, rack the wine into the new carboy. You may have space at the top which will need to be “topped off” with more wine. You can either use wine from another container, or finished wine to do this. It is very important that there is less than a 1/2” of headspace in each container. At this point you should also add 1/4tsp of potassium metabisulfite per 5 gallons of wine.

13. Now it is time to let your wine age. You will need to rack it and add additional SO₂ every 3 months. Make sure you sanitize all equipment and containers when racking and keep them topped off within ½”. Come visit Musto Wine Grape for bottling advice and supplies.

The Winemaker’s Think Tank: Vol 23 – How do I test for Acid?

Wine being checked on component saturation in laboratory on winery factory

What’s the Winemaker’s Think Tank?

Every Thursday we will post about a few frequently asked questions that our winemaker has answered. If you have a winemaking question you would like to have answered, please email us at support@juicegrape.com and we will try to get into next week’s post. Cheers! :)

How do I test for Acid?

When testing for acidity in wine, you are looking for the Total Acidity value, or the amount of acids in grams per liter of wine. While this may sound complex, it will help you in achieving a proper balanced flavor in your end product. You will need a few basic lab supplies:  a test tube, a small 10ml graduated syringe, phenalthalein, sodium hydroxide. Draw a 15ml sample of the wine to be tested into the test tube. Add three drops of the phenalthalein. Swirl the drops around in the wine to mix it in thoroughly. (Note: When using sodium hydroxide, be very careful. It is a strong base that can cause burns. We suggest wearing eye and skin protection.) Using the 10 ml graduated syringe, slowly drop in the sodium hydroxide by .5ml at a time. Every drop, swirl the test tube contents to mix and observe any color reactions. Upon adding the drop, you will see an immediate color change, that will then dissipate. For white wines, you will observe a pink color and for red wines you will observe a grey color.  Keep repeating the process of adding a drop, swirling and observing until the color change is permanent. The amount of sodium hydroxide used, when the color change is permanent, will give you the Total Acidity. If 6ml of Sodium Hydroxide are used, then the wine contains .6% or 6g/L of TA.

We hope this information helps with your winemaking. If you have any follow up questions or winemaking questions in general, please email us at support@juicegrape.com.