Saturday, February 9, 2008

Acid Reduction by Blending

When you are attempting to increase (or decrease) the acidity of wine by blending two wines together, the first step is to determine the titratable acidity (TA) of both wines. The second step in this process is to determine the volume required of the blend wine which will be required to raise (or lower) the TA of the wine you are trying to alter.

The formula for determining the volume of blend wine required is:

Z = X * (DTA - W) / (Y - DTA) where

DTA = Desired Total Acidity
W = TA goal of wine to be modified
X = Volume of wine to be modified
Y = TA of blend wine
Z = Volume of blend wine

Example: If you had 6 gallons of wine (X) with an existing TA of 6.2 and you desired to raise the TA of this wine to 6.5 (DTA) by blending an unknown volume of wine (Z) which has a TA of 7 (Y) your formula would look like this:

Z = 6 * (6.5 - 6.2) / (7 - 6.5) or

Z = (6 * .3) / .5 or

Z = 1.8 / .5 or

Z = 3.6 gallons of blend wine with a TA of 7 will be required to increase the TA of our 6 gallon batch of wine with an existing TA of 6.2 to our desired TA of 6.5.

BlueStem Winery is your full-service source for wine making equipment and homebrewing supplies in beautiful, downtown Parkersburg, Iowa. Our store hours are posted on the BlueStem Winery website and we are on the web 24-7 with a complete line of wine making and homebrew supplies.

If you are home winemaking or want to order beer brewing ingredients and have questions, do not hesitate to call us at 319.346.1046 during business hours or you can e-mail us at any time at

BlueStem Winery stocks a large of inventory of WinExpert wine kits and we also have a growing inventory of Cellar Craft kits. Cellar Craft wine kits and WinExpert kits are industry leaders in excellent quality kits for making wine at home.

The next time you purchasing winemaking supplies, home brewing supplies, brewing equipment or ingredients we will be ready to meet your needs. Excellent products, prompt shipping and knowledgeable, friendly service.

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