Patent ID: 7131376

Claim:
An ink feeding method for feeding a preset ink to form an ink film on an ink roller of a printing machine to print a first image, in which a presetting operation is required to adjust a thickness of the ink film to a second image to be printed subsequently to the first image, said method comprising: a density reading step for reading density data obtained by measuring density of the printed first image; a first computing step for computing, from said density data, a thickness of the ink film remaining on the ink roller after said first image is printed; a second computing step for computing a thickness of the ink film required for printing said second image, from a target density for said second image; and a third computing step for computing a preset ink feeding rate from the thickness of the ink film remaining on the ink roller after said first image is printed, computed in said first computing step, and the thickness of the ink film required for said second image, computed in said second computing step.