3. De-acidification with Erbslöh Kalinat Kalinat is a potassium-hydrogen-carbonate and is
used principally for the fine de-acidification of young wine. For improving
quality or rounding off of flavour (according to the flavour type) as well
as for its ease of handling, Kalinat is the material to use. With the addition of Kalinat the existing tartaric
acid falls out as potassium-hydrogen-tartrate, while with Kalk
de-acidification calcium-tartrate is crystalised out. As potassium-hydrogen-tartrate
is removed considerably faster in the cold, or by using Kali-Kontakt (add 4
g/l Kali-Kontakt at 0 °C) a very fast stabilization can be achieved and the
wine will be ready to bottle in a much shorter time. Possibly the cooling
can be done by the Winter cold. However, if the wine stays at cellar
temperature, the crystallizing out will take several weeks. With Kalk at least 6 weeks must be allowed. For the precipitation of 1 g of tartaric acid 0.67
g/l of Kalinat should be used. Kalinat can be added directly to the wine.
The mixing must be done with care because of the escaping carbonic acid. As in this stage of the wine there is less tartaric
acid, a large amount of de-acidification can lead to an increased pH value.
For this reason an analytical test of the total-acid and tartaric-acid
should be carried out before a wine de-acidification. From that the possible
amount of de-acidification is known, without the tartaric-acid being too
strongly reduced and the pH value too strongly increased. Without the
aforementioned test the amount of de-acidification should, for the sake of
safety, not exceed 2 g/l. The final acid value which has been calculated
will only be reached after the complete crystallising-out of the
potassium-hydrogen-tartrates, that is after the appropriate time in store or
after the use of cooling or the use of Kontakt. If, after using the Kalinat,
the total acid is not assessed to reach the complete decrease in acid as
worked out, then nevertheless the acid neutralisation required is already
partly achieved. Merely the crystallising-out has not yet fully taken place.
With wines with very stable tartrate crystals (especially with a low
potassium content) and a low Kalinat de-acidification, e.g. of 0.5 to 1 g/l,
it is always possible that no tartrate crystals at all fall out and so they
will not reach the analytical value which was aimed for. Taste-wise, however
the required acid correction is there. The acid is only relevantly absent in the taste.
Winegrowers Supplies
- De-acidification of Must or Wine