Abstract: A doctor (20), in particular for printing cylinders and coating systems, includes a doctor edge (21), a doctor body (22), and a curved blade profile (25) which is formed between the doctor edge (21) and the doctor body (22). In order to produce a doctor (20) which reduces the maintenance requirements of a gravure, flexographic, offset and/or digital printing machine and increases the service life of a doctor (20), according to the invention the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) is square or cuboid and/or the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) has at least one turning point (26).

Abstract: A ductor for a printing press having a rounded ductor profile (3) is distinguished by the fact that the radius of curvature of the ductor profile (3) is greater at the point (10) which corresponds to the ductor angle (?) than at a tangent point (11) which lies 20° further towards the tip and smaller than at a tangent point (12) which lies 15° further towards the flank.