WINEMAKING SUPPLIES, GRAPES and JUICE 
for amateur winemakers.
Fall Bright, The Winemakers Shoppe, 10110 Hyatt Hill, Dundee, NY 14837 
607-292-3995

Tartaric acid to add: grams per volume

Tom has changed the tartaric addition rate to 1.5 (1.49g) g/gallon will increase the acid by .1%.  The approximate kitchen measure is ~1/4 teaspoon will raise one gallon TA it by .1%  This is double of what we have figured in the past.  

Always err on the side of caution.  calculate, reduce calculated dose by half, add, retest.  

SO I have discarded out entire chart we use to have here for tartaric acid addition.  Sorry.  

Basic info from long ago, on our tartaric acid label: 1.9 grams (1/4 teaspoon) of tartaric acid per gallon will raise the acid approximately .05%. 

The recommendation of less acid blend is based on the use of citric acid in these blends. Citric acid will not be reduced by cold stabilization in case of overdose. 

The competition currently indicates a rate of 4.1 grams/gallon to increase the TA by .1%  (Oct 2010)