Patent ID: 7901025

Claim:
An ink jet printing apparatus that performs a relative movement of a first ejection portion for ejecting a first ink and a second ejection portion for ejecting a second ink, which is a different type of ink from the first ink, to a printing medium, and causes the first and second ejection portions to eject the first and second inks to print an image on the printing medium during the relative movement, wherein a permeation speed of the first ink in a case that the first ink is ejected on the second ink that has been ejected onto the printing medium is slower than a permeation speed of the second ink in a case that the second ink is ejected on the first ink that has been ejected onto the printing medium, and ejection timings of the first and second inks from the first and second ejection portions are controlled so that a percentage of pixels to which the second ink is ejected after the first ink is ejected is higher than a percentage of pixels to which the first ink is ejected after the second ink is ejected.