Method of varying the ink density of the full tone in offset...

Details Method of varying the ink density of the full tone in offset... Method of varying the ink density of the full tone in offset...

B - Operations, Transporting

41

F

B41F 7/02 (2006.01) B41C 1/05 (2006.01) B41C 1/10 (2006.01) B41F 31/00 (2006.01) B41F 33/00 (2006.01) B41M 1/00 (2006.01) B41M 1/04 (2006.01) B41M 1/06 (2006.01) B41M 1/10 (2006.01)

Patent

CA 2382338

A method of varying the ink density of the full tone in printing within a rotary printing machine with an ink application system which can provide a constant quantity of ink which, in spite of constant ink supply from the inking unit, permits control of the full-tone density or adaptation of the raster tonal values in the print. The method includes setting the binary image on a printing plate. A basic raster of raster points, which determines the area coverage of the binary image, is produced on the printing plate for the variable-area image information. The basic raster is then superimposed on a fine microraster in such way that the area coverage of the basic raster is reduced by a percentage which can be set between 0% and 100%.

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