C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/02 (2006.01) B41J 2/21 (2006.01) C09D 11/00 (2006.01)
Patent
CA 2356809
An ink set which comprises a black ink containing an aqueous medium and a pigment dispersed in the aqueous medium by an action of an ionic group; and at least two color inks each containing a coloring material and an aqueous medium, wherein (i) respective images formed with the respective color inks have the same .DELTA.E or have the difference in .DELTA.E that is 10 or less in a CIELAB color space display system in a fading test under conditions that cause fading corresponding to pseudo-indoor sunlight fading through a window for 3 years or more, and (ii) at least one of the color inks contains at least one of a coloring material and an additive that destabilize dispersion stability of the pigment in the black ink. The ink set can provide a high quality multicolor image keeping color balance after long preservation and showing less bleeding between black and color regions.
Asaki Noriyasu
Kanke Tsuyoshi
Mafune Kumiko
Takada Yoichi
Takizawa Yoshihisa
Canon Kabushiki Kaisha
Ridout & Maybee Llp
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