Test for total acidity following the instructions in your acid testing kit. If the acidity is less than .7%, add enough tartaric acid to bring it to that level.
Test for total acidity following the instructions in your acid testing kit. If the acidity is less than .7%, add enough tartaric acid to bring it to that level.
测定酸度：用你的测酸计测葡萄汁的酸度，如果酸小于0.7％，就需要添加酒石酸直到你希望的酸度。通常为7～8之间为宜。