| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inkjet recording ink excellent in spectral characteristics, the ability to be read with near-infrared rays, fastness, and water resistance. <P>SOLUTION: The inkjet recording ink comprises a pigment represented by formula (I), wherein Y<SP>1</SP>and Y<SP>2</SP>are each independently a group of non-metal atoms which constitute an alicyclic or heterocyclic ring; L<SP>1</SP>is a methine chain composed of 5 or 7 methine groups; and X<SB>1</SB><SP>+</SP>is an alkaline earth metal ion, a transition metal ion, or another polyvalent metal ion. <P>COPYRIGHT: (C)2008,JPO&INPIT |
