US 10,889,116 B2
Image printing method
Takaharu Aotani, Tokyo (JP); Masahiro Terada, Hadano (JP); Hidetaka Kawamura, Yokohama (JP); Akihiro Taya, Yokohama (JP); Yohei Masada, Tokyo (JP); Masanobu Ootsuka, Tokyo (JP); Shoji Koike, Yokohama (JP); and Yutaka Yoshimasa, Yokohama (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 18, 2018, as Appl. No. 16/39,180.
Application 16/039,180 is a continuation of application No. PCT/JP2017/001448, filed on Jan. 18, 2017.
Claims priority of application No. 2016-010901 (JP), filed on Jan. 22, 2016.
Prior Publication US 2018/0319164 A1, Nov. 8, 2018
Int. Cl. B41J 2/155 (2006.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01); B41M 5/00 (2006.01); B41J 2/21 (2006.01); C09D 11/12 (2006.01); B41M 5/52 (2006.01); C09D 11/08 (2006.01)
CPC B41J 2/155 (2013.01) [B41J 2/21 (2013.01); B41J 2/2107 (2013.01); B41J 2/2146 (2013.01); B41M 5/0023 (2013.01); B41M 5/52 (2013.01); C09D 11/08 (2013.01); C09D 11/12 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An image printing method comprising the step of:
applying at least two inks that contain a color pigment, resin particles, and water onto a printing medium by ejecting the inks using an inkjet printing apparatus,
wherein the inkjet printing apparatus includes at least two printing line heads sequentially arranged in a printing medium conveying direction, each of the printing line heads comprising a row of ejection units,
the printing medium is plain paper or a high-absorbency printing medium,
the printing medium having a water absorption coefficient Ka of 0.1 mL/(m2·ms1/2) or more,
a rub fastness additive is contained in a first ink ejected from at least a first printing line head that is located at an uppermost-stream position in the printing medium conveying direction of the at least two printing line heads,
the content of the rub fastness additive in a second ink ejected from a printing line head that is located at a position downstream of the first printing line head in the printing medium conveying direction is less than the content of the rub fastness additive in the first ink, and
in the printing medium to which the first ink and the second ink are applied, the color pigment in the first ink and the color pigment in the second ink are fixed in this order from a side of a surface to which the first ink and the second ink are applied.