| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a yellow coloring matter that is suitable for inkjet recording, has a hue of high clarity, strong fastness of recording product and excellent storage stability and an ink composition containing the same. <P>SOLUTION: The ink composition comprises a water-soluble monoazo compound represented by formula (1) (R<SB>1</SB>is a hydrogen atom or a 1-3C alkyl group; Y<SB>1</SB>is a carboxy group, a methyl group or a phenyl group; Y<SB>2</SB>is a hydroxy group or an amino group; Y<SB>3</SB>, Y<SB>4</SB>and Y<SB>5</SB>are each independently a hydrogen atom, a sulfonic acid group or a carboxy group; at least one of Y<SB>3</SB>, Y<SB>4</SB>and Y<SB>5</SB>is a sulfonic acid group or a carboxy group) or its salt. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
