Patent ID: 7311394
Filing Date: 2007-12-25
Classification: B41J

Abstract:
1. An ink jet printing method of performing printing by repeating a scanning step for scanning a row of ink ejection orifices for ejecting ink and a row of reacting liquid ejection orifices for ejecting a reacting liquid that reacts with the ink, across a printing medium, in order to eject the ink and the reacting liquid onto the printing medium, and a feeding step for feeding the printing medium, wherein said scanning step performs the scan of the row of ink ejection orifices and the row of reacting liquid ejection orifices, so that a scanning area of the ink to which the ink is ejected while the row of ink ejection orifices scans and a scanning area of the reacting liquid to which the reacting liquid is ejected while the row of reacting liquid ejection orifices scans are adjacent to each other in a feeding direction of the printing medium, and, among the ink and the reacting liquid that have different permeability, a width of the scanning area of a liquid having relatively high permeability along the feeding direction is made greater than that of the scanning area of a liquid having relatively low permeability, said feeding step feeds the printing medium, by an amount corresponding to a width which is smaller than the width of the scanning area of the liquid having relatively high permeability by a predetermined amount so that the liquid having relatively high permeability is ejected on the liquid having relatively low permeability, ejection of the liquid having relatively low permeability onto the scanning area of the reacting liquid ejection orifices is performed during a single scan, and at least for the liquid having relatively high permeability, ejection of the liquid onto a first scanning area, which corresponds to a width of the predetermined amount within the scanning area of the liquid, is performed during two scans, and ejection of the liquid onto a second scanning area other than the first scanning area, within the scanning area of the liquid, is performed during a single scan.