Bubbly foam pattern (froth) on top of the wine
in the glass after using Coravin
Have you ever experienced a bubbly foam pattern (froth) on top of the wine in the glass after using Coravin?
If not, know that it may happen; even if your glass is spotlessly clean, it has nothing to do with the wine, and this is usually the reason why.
It is usually due to a slight excess of gas released into the glass before or after pouring the wine. If the wine is frothy at first (like in the picture), you might press the Coravin button too hard or too many times.
You're supposed to tap the button, wait for the wine to stop pouring, tap again, and so on until you've poured your desired amount.
This method is a bit slow, but you're not supposed to hold the button down or quickly press it multiple times while pouring the wine. Otherwise, you will release this excess of gas.
To prevent foam, press the button once before pouring the wine to release the excess gas in the air rather than in the glass; then, you can pour the wine into the glass. It might take some practice before you get used to it and become a pro at using Coravin.
If you always get the frothy pattern, do not panic. The argon gas used in Coravin is inert, colorless, odorless, and nonreactive, so it has no adverse effects on the wine.
And for those who are not familiar with Argon, here are a few facts:
Argon is added to wine to displace air. Because it is denser than air, it settles above the liquid, protecting the wine from souring and oxidation.
This method often preserves open wine and liquid bottles in bars, restaurants, and even barrels in wineries.
Argon does not dissolve in wine and, therefore, provides a long-term blanket of protection for the wine.
As for the time of preservation, Coravin claims to "preserve wine for months", yet from personal experience, it is more likely to be a few weeks, depending on the amount of wine remaining in the bottle, of course (the more wine in the bottle the longer).
Hope you've found this post helpful.
Cheers! Santé!
Dom
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