Translation of "For hours and hours" in German

The films were assessed after drying at room temperature for 24 hours and 48 hours.
Die Filme werden nach 24 h und nach 48 h Raumtemperaturtrocknung beurteilt.
EuroPat v2

Related phrases

hours and hours at this hour hour after hour hour
in a few hours after-hours from hour to hour for hours and hours
hour by hour every hour on the hour