Patent ID: 9399355
Filing Date: 2016-07-26
CPC Classification: B41J

Claim Text:
1. A method of printing an image on a printing medium using a print head ejecting a first ink, a second ink having higher lightness than the first ink, and a third ink having lower lightness than the second ink, the method comprising: preliminarily ejecting the first ink in a predetermined area; preliminarily ejecting the second ink in the predetermined area; preliminarily ejecting the third ink in the predetermined area; and ejecting ink in the predetermined area to form the image, wherein preliminarily ejecting the first ink, the second ink and the third ink is performed to maintain an ink ejection state of the print head without contributing to image formation, wherein dots of the first ink and dots of the second ink formed in the predetermined area by the preliminary ejection are printed to be superposed on each other, and wherein the dots of the second ink and dots of the third ink formed in the predetermined area by the preliminary ejection are printed not to be superposed on each other.