Calcium Carbonate (CaCO3) or Chalk: Use at the rate of between 0.67 and 1.53 g/l to reduce TA by 1.0g/l. Seeding with cream of tartar crystals and chilling hastens the process.
Calcium Carbonate
Another name for precipitated chalk. It is used to reduce excess acids in wine, in particular for reducing oxalic acid from rhubarb wines.
The area of Jerez in which is being cultivated the vine is classified according to the percentage of calcium carbonate found in the soil, the typical and appreciated soil made of chalky sediments, a characteristic Jerez shares with Champagne.
The soil is rich in limestone and calcium carbonate and also contains a significant amount of decomposed granite. Chalone is situated in an arid chapparral environment, in which temperatures can vary as much as 60F° in one day.
The soil there is very calcareous (chalky; containing calcium carbonate), offering good drainage. Well-drained soils have a higher average temperature, which assists ripening.
It means either the addition of substances such as calcium sulfate before fermentation in order to increase acidity, or calcium carbonate to reduce acidity.
tufaSoft, porous rock consisting of calcium carbonate deposited from springs rich in lime. twenty-point scaleTasting system developed by U. C. Davis to rate table wines.
 See also: Wine, Fermentation, Fruit, Grape, Taste
  
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