| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a near infrared absorptive image forming composition excellent in spectral characteristics, and an ink and an electrophotographic toner using the same. <P>SOLUTION: The near infrared absorptive image forming composition includes a dye represented by general formula (I): where L<SB>1</SB>is a methine chain composed of seven methine groups, and L<SB>1</SB>may have a substituent but the substituent is not an amino group; R<SP>1</SP>, R<SP>2</SP>and A each independently are an alkyl or cycloalkyl group, which may be substituted; B is a group of atoms necessary for forming an aromatic hydrocarbon ring or aromatic heteroring, and the ring formed with B may be substituted; Y is a cation necessary for keeping the charge balance in the molecule, but Y may not be present when Y is unnecessary for the charge balance; and R<SP>1</SP>and R<SP>2</SP>may bond to each other, to form a ring. <P>COPYRIGHT: (C)2009,JPO&INPIT |
