The invention relates to a method of correcting local,machine-based inking nonuniformities on rotary printingmachines, in which the following method steps are executed:Firstly, the inking behavior of the printing units of amulticolor rotary printing machine is determined by means oftest plates. The inking nonuniformities on the test plates aretransmitted to the pre-press stage. Using the data about theinking nonuniformities of the test plates, the raster tonalvalues of the color separations of a printing plate aremodified in such a way that the inking nonuniformities aremaintained locally on the basis of the location of theiroccurrence in the print on the printing plates or films.
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