Method of correcting local, machine-based inking errors in rotary printing machines

   
   

First, the inking behavior of the printing units of a multicolor rotary printing machine is determined by means of test forms. The inking nonuniformities on the test forms are transmitted to the pre-press stage. Using the data about the inking nonuniformities of the test forms, the raster tonal values of the color separations of a printing form are modified in such a way that the inking nonuniformities are compensated locally on the basis of the location of their occurrence in the print on the printing forms or films.

 
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