Title:
INK SET, AND IMAGE FORMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/125908
Kind Code:
A1
Abstract:
An objective of the present invention is to provide an ink set which comprises magenta ink and orange ink, which enables the formation of images having color regions that present difficulties for formation when only CMYK 4-color ink is used, and which enables the expansion of the color gamut in the red-orange region in the L*a*b* color space. The objective is achieved by an ink set comprising a plurality of inks that contain pigment, a gelling agent, a photopolymerizable compound, and a photopolymerization initiator, and that can be cured by irradiation with actinic rays, wherein: the plurality of inks includes magenta ink and orange ink; the pigment contained in the magenta ink includes a magenta pigment having a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 202 that has been surface treated with alumina and sulfonic acid; the content of the alumina in the magenta pigment is 1500-7500 mass ppm; and the content of the gelling agent in each of the inks is 1-5 mass%.
Inventors:
GOI KATSUNORI
IKEDA MASASHI
IKEDA MASASHI
Application Number:
PCT/JP2016/053595
Publication Date:
August 11, 2016
Filing Date:
February 05, 2016
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
C09D11/322; B41J2/01; B41M5/00; C09D11/40
Foreign References:
| JP2011256275A | 2011-12-22 | |||
| JP2014091829A | 2014-05-19 | |||
| JPS5934737B2 | 1984-08-24 | |||
| JP2005042012A | 2005-02-17 | |||
| JP2002121411A | 2002-04-23 | |||
| JP2014118570A | 2014-06-30 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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