Patent ID: 8973500
Filing Date: 2015-03-10
Classification: B41F

Abstract:
1. A method for controlling an amount of dampening solution in a printing unit of a printing press, the method comprising the following steps: providing a computer and a measuring device; setting the amount of dampening solution in the printing unit based on data of a current print job; reducing the amount of dampening solution towards a smearing threshold with the computer; recording color measurement values with the measuring device in at least one full tone area with low area coverage and in at least one halftone area with high area coverage on printed matter of the current print job, the at least one full tone area having low area coverage compared to the at least one halftone area; and stopping the reduction of the amount of dampening solution with the computer when a dot gain of a halftone in areas with high area coverage increases significantly and a density of a full tone in areas with low area coverage increases significantly.