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See under shrinkage.

Term for the loss of liquid in a wine container due to evaporation, which occurs mainly in containers made of wood and, to a lesser extent, other materials, as well as in bottles sealed with natural corks. Compared to tanks made of stainless steel, glass or ceramics, wooden barrels are not absolutely leak-proof, but there is an exchange of substances such as liquids, oxygen and possibly also harmful substances such as microorganisms in both directions (outwards as well as inwards), which can lead to negative impairment or even spoilage of the wine. In old wooden barrels, leaks, especially between the barrel staves, can result in relatively high shrinkage. Depending on the type of wine, the resulting empty space in a barrel must...

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