The term is used both for the residues from grape pressing or residues after mash fermentation and for the brandy distilled from them (pomace brandy).
Term for the pulpy mass of grape skins, pulp, seeds and, if no destemming has taken place, also stems after pressing. Other names are Bälisch (Mosel), Lauer, Leier, Lor(c)ke, Lur(c)ke, Trebern, Tröber and Trasch/Träsch (Switzerland). Sometimes a distinction is made: Trester = press residue (white wine), Trebern = fermentation residue (red wine). The components that float to the top during mash fermentation are called pomace. This is brought into intensive contact with the must/wine by machine or manually during fermentation (see under Pigeage = Underpushing).
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Roman Horvath MW
Domäne Wachau (Wachau)