Abstract: A process and device are disclosed for dyeing histological specimens arranged on microscope slides. The microscope slides are transported by a conveyor (18) in object slide holders to processing stations (16) where they are subjected to processing steps that correspond to a selectable dyeing process. The conveyor (18) is designed in such a way that each object slide holder (14) is separated therefrom after entering a processing station (16), so that during the time a processing step is carried out in said processing station other object slide holders (14) can be transported to free processing stations (16) according to the selected dyeing process.