Printing process diagnostic method and system for a rotary...

Details Printing process diagnostic method and system for a rotary... Printing process diagnostic method and system for a rotary...

G - Physics

01

N

340/124.5

G01N 21/84 (2006.01) B41F 33/00 (2006.01) G01N 21/47 (2006.01)

Patent

CA 2035926

The invention relates to a method for detecting diffuse reflections of full-tone and half-tone fields in order to prepare diagnoses on problem factors and/or changes in process parameters, such as blurring, dampness, machine temperature. During printing, the diffuse reflections of the full-tone and half-tone fields are detected with scanners. This is done in such a way that for at least two printed copies, in at least two fields of each copy, the diffuse reflections of full-tone and half-tone areas, or of at least two half-tone fields of different area coverages are compared, and based on the results of this comparison, diagnoses and/or control recommendations are made.

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