There is described a method and an inking apparatus (50) for forming an ink pattern (80) on the surface of a form cylinder (15b) of a printing press, which ink pattern (80) exhibits, at least in part, a two-dimensional ink gradient extending in an axial direction and a circumferential direction on the surface of the form cylinder (15b). At least first and second chablon cylinders (20, 25) are placed one after the other along an inking path of the ink train (20, 25, 30, 31, 32, 33, 34, 35a, 35b, 36, 37) inking the form cylinder (15b) for distributing ink in the axial and circumferential directions and means (200, 201, 210, 211, 212, 250, 251, 260, 261, 262) are provided for subjecting the first and second chablon cylinders (20, 25) to cyclical oscillation movements in the axial direction and the circumferential direction.