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French for "Key to the wine" the Clef du Vin is a spoon-shaped aluminum and copper stick holding a clay pellet designed for dipping into red wines designed for aging. The Clef du Vin claims to chemically age wine (by reducing and solidifying tanins) in a balanced way, similar to the natural aging the wine would achieve in the bottle, but much faster (one second on contact with the Clef du Vin claimed similar to one year of bottle aging.)

The idea is to test a glass of wine by dipping the Clef into it, and periodically taste it, to determine how well and how long it will age.

The site Afis Science has tested the device and apparently found the claims untrue.

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13y ago

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