Patent ID: 7249560

Claim:
An ink supply amount adjustment method for a printing press, comprising the steps of: measuring one of a density value and a color value of a printing product; obtaining a difference between the measurement value and a preset reference value related to one of the density value and the color value; determining, in accordance with a set allowance mode, a relationship between the obtained difference and at least one of a preset first allowable difference and a preset second allowable difference larger than the first allowable difference, wherein the determining step comprises the steps of: determining whether the obtained difference is larger than the first allowable difference for a first allowance mode, determining whether the obtained difference is larger than the second allowable difference for a second allowance mode, and determining whether the obtained difference falls between the first allowable difference and the second allowable difference for a third allowance mode; and adjusting an ink supply amount in accordance with a determination result, wherein the adjusting step comprises: executing an ink supply amount adjustment operation for the first allowance mode, and the obtained difference is larger than the first allowable difference, for the second allowance mode, and the obtained difference is larger than the second allowable difference, and for the third allowance mode, and the obtained difference falls between the first allowable difference and the second allowable difference.