precipitated chalk

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Desacid precipitated chalk
The most popular deacidifier! Contains extra pure calcium carbonate. Dosage: 6.5 g/10 l reduces the acidity with 1 g/l. Also precipitates oxalic acid in rhubarb: Dosage: 2 g/l of rhubarb juice.

When and how to use a deacidifier?
Deacidification is best done as early as possible. Calcium carbonate is the most commonly used deacidifier. A great deal of frothing sometimes occurs on deacidification. You should therefore use a sufficiently roomy barrel/receptacle. Add the necessary quantity of deacidfier to the must, stir for a few minutes and leave to rest for a while. Stir again and once more leave to rest. Repeat this a few times until there's no more CO2 formed (no sound of gas). Now leave everything to settle for 12-24 hours. Then siphon the must/wine, leaving the white layer at the bottom.


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