Patent ID: 7290858

Claim:
An ink jet printing method that uses a printing head for ejecting a plurality of colors of ink on a printing medium to perform printing, in which the plurality of colors of ink are ejected on the printing medium for preliminary ejection in conjunction with ink ejection for the performance of printing, said method comprising: a step for generating print data by adding preliminary ejection data for the preliminary ejection to print data based on an image to be printed; and a step for ejecting the plurality of colors of ink on the printing medium from the printing head, based on the generated print data, wherein a dot pattern of the plurality of colors of ink formed based on the preliminary ejection data is a pattern having a relation that a distance between any two dots other than a dot of highest-lightness is longer than a distance between a dot nearest to the dot of highest-lightness and a dot of highest-lightness, among the plurality of colors of dots.