| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide ink which is excellent in color reproducibility and has sufficient fastness against light, heat, humidity and active gases. <P>SOLUTION: This ink is characterized by containing at least one colorant represented by the general formula (I) (R<SB>1</SB>is an alkyl, an alkenyl, an alkynyl, an aralkyl, an aryl, a heterocyclic group, an acyl, an alkyloxycarbonyl, an aryloxycarbonyl, carbamoyl, an alkylsulfonyl, an arylsulfonyl, or sulfamoyl; X<SB>1</SB>is -CR<SB>2</SB>= or N; R<SB>2</SB>is H or a substituent; X<SB>2</SB>is -CR<SB>3</SB>= or N; R<SB>3</SB>is an electron-attracting group having a σp value of ≥0.20; the colorant may form a dimer or trimer through R<SB>1</SB>, R<SB>2</SB>, R<SB>3</SB>or A; A is a specific aryl, a specific heterocyclic group, or the like). <P>COPYRIGHT: (C)2007,JPO&INPIT |
