Definition: chemisée

Wines that coat the inside of the bottle after long ageing are wines that have undergone minimal filtration. Given that filtration cannot eliminate only the undesirable elements and that, as a result, useful and positive elements of the wine are lost during filtration, wines that coat the inside of the bottle are a sign of quality.
In this case, slow and gradual decanting into a carafe is useful to remove the sediment from the glasses.
See also "masked".