| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ink composition having improved bronze phenomenon and improved recorded image preservability. <P>SOLUTION: This ink composition is characterized by comprising a colorant represented by general formula (I), water, a guanidine-based compound, and a specific water-soluble planar compound. In general formula (I), M is H, a metal atom, or the like; Pc is a phthalocyanine nucleus; X<SB>1</SB>to X<SB>4</SB>are each a substituent selected from among -SO-R<SB>1</SB>, -SO<SB>2</SB>-R<SB>1</SB>, -SO<SB>2</SB>NR<SB>2</SB>R<SB>3</SB>, -CONR<SB>2</SB>R<SB>3</SB>, -CO<SB>2</SB>-R<SB>1</SB>, -CO-R<SB>1</SB>, sulfo group and the like. <P>COPYRIGHT: (C)2008,JPO&INPIT |
