US 8,740,336 B2 · Ink jet printing apparatus and ink jet printing method

Abstract

An ink jet printing apparatus and an ink jet printing method, whereby high-permeation ink and low-permeation ink are employed to prevent a reduction in optical density is provided. The ink jet printing apparatus controls ejection of ink from print heads, so that only low-permeation ink is ejected onto the edge area of a print medium that is adjacent to a non-printing area, and this time, high-permeation ink is not employed. Further, the ink jet printing apparatus controls ejection of ink from the print heads, so that both low-permeation ink and high-permeation ink are employed for the non-edge area that is adjacent to the edge area, and to perform printing, the low-permeation ink is ejected onto the non-edge area prior to the high-permeation ink.

Claims14

Dependent claims

An ink jet printing apparatus comprising:

a print head configured to eject a first ink and a second ink for printing an image on a printing medium,
wherein the second ink is a similar color to a color of the first ink and has higher permeation into the print medium than the first ink;
and
a printing controller configured to control ejection of the first ink and the second ink from the print head, in both a scan in which the print head scans in a first direction and a scan in which the print head scans in a second direction that is opposite to the first direction,
wherein the printing controller is further configured to control ink ejection for a predetermined area such that both the first ink and the second ink are ejected to the predetermined area, and the first ink is ejected prior to the second ink in both the scan in the first direction and the scan in the second direction.

2 more elements

Dependencies are inferred from the claim text.

Ink jet printing apparatus and ink jet printing method

Life of this patent

Ink jet printing apparatus and ink jet printing method

Life of this patent

Abstract

Claims14