Patent ID: 7959725
Filing Date: 2011-06-14
Classification: C09D,Y10T

Abstract:
1. An ink set comprising a magenta ink, a yellow ink, and a cyan ink, wherein each of the magenta, yellow and cyan inks comprises pigment in an amount of at least 3 wt % but not more than 10 wt %, wherein the magenta ink (M) comprises C.I. pigment violet 19 and is such that, in a case where the Y value of this ink in the XYZ display system stipulated by the CIE is 55 as calculated from the ultraviolet-visible transmission spectrum of a dilute aqueous solution of the ink with a coloring material concentration of 0.01 wt % or less, the Z value of this ink in the same system is 83 or less, wherein the magenta ink has an L* value in the CIE-stipulated Lab display system of an aqueous solution of this ink diluted 1000 times by weight of 70 or less, the yellow ink has an L* value in the CIE-stipulated Lab display system of an aqueous solution of this ink diluted 1000 times by weight of 95 or less, and the cyan ink has an L* value in the CIE-stipulated Lab display system of an aqueous solution of the ink diluted 1000 times by weight of 70 or less, and wherein the ink set further comprises a light magenta ink (Lm) comprising C.I. pigment violet 19 in which the L* value in the CIE-stipulated Lab display system of an aqueous solution of the ink diluted 1000 times by weight exceeds 70, and a light cyan ink (Lc) in which the L* value in the CIE-stipulated Lab system of an aqueous solution of the ink diluted 1000 times by weight exceeds 70.