The printing machine comprises at least one transfer system for conveying a substrate onto an impression cylinder and at least one screen of cylindrical or flat shape, with a doctor blade, said screen collaborating with the impression cylinder and intended to print the substrate with an ink containing pigments that can be orientated by a magnetic field and an unloading system for carrying the substrate away. The impression cylinder comprises at least one magnetic element on its impression surface, said magnetic element being positioned at a point corresponding to said impression performed by said screen on said substrate.