Abstract: An apparatus for processing a printing plate with a liquid comprises two liquid containing containers open at their upper side, wherein a plurality of rotating brushes is provided in each container. These brushes are at least partially immersed in the liquid. Further, means for moving the printing plate along the brushes are provided, which means comprises a support table for the printing plate which is coupled with a central guiding beam extending above the containers in a closed processing compartment. The support table is movable backward and forward in the longitudinal and lateral direction of the guiding beam with respect to the guiding beam over the brushes.