Flexographic printing press with device for washing the back-pressure cylinder

The invention relates to a flexographic printing press with a back-pressure cylinder and at least one inking unit, which has an exchangeable printing cylinder, which can be placed against the back-pressure cylinder, an engraved ink transfer cylinder, which can be placed against the printing cylinder and a chamber doctor blade, which can be placed against the engraved ink transfer cylinder. A flexographic printing press with a back-pressure cylinder () and at least one inking unit (), which has an exchangeable printing cylinder (), which can be placed against the back-pressure cylinder (), an engraved ink transfer cylinder (), which can be placed against the printing cylinder and a chamber doctor blade (), which can be placed against engraved ink transfer cylinder, wherein a washing cylinder () is constructed to be inserted in the inking unit () instead of the printing cylinder () and to apply cleaning liquid to the surface of the back-pressure cylinder ().