A method for judging achievability of density correction of an image, the density correction being performed by a printing apparatus during printing of the image, the printing apparatus including a plurality of nozzle groups each consisting of a plurality of nozzles that are lined up in a predetermined direction, the method, includes: printing on a medium a comparison pattern whose density is not corrected and a comparison pattern whose density is corrected, by causing at least two nozzle groups among a plurality of the nozzle groups to eject ink and forming dots in a mixed manner with the ink ejected from the at least two nozzle groups, reading the density of each of the comparison patterns, and judging, based on the read density, achievability of density correction of an image.