| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a yellow ink that gives an image excellent in light resistance, alkali resistance, hue, and color tone (color development). <P>SOLUTION: The ink includes at least two coloring materials of a first coloring material and a second coloring material, wherein the first coloring material is a pigment represented by formula (I); and the second coloring material is C.I. pigment yellow 128 and/or 213. In formula (I), X<SB>1</SB>and X<SB>2</SB>are each independently a cyanoacetamide residue or a residue of a barbituric acid. Further, X<SB>1</SB>and X<SB>2</SB>may each independently have an alkyl group, an aryl group, or a substituent of an aryl or heteroaryl group substituted with halogen, alkyl, alkoxy, alkoxycarbonyl, or nitro. <P>COPYRIGHT: (C)2011,JPO&INPIT |
