| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous ink having good color and excellent in fastness to light and an active gas in environment, especially, to ozone gas. <P>SOLUTION: This aqueous ink contains at least two kinds of dyes of which the each has at least one of ionic hydrophilic group in its molecule, wherein at least one kind of the dyes comprises an azo dye having at least one of the ionic hydrophilic group in its molecule and expressed by general formula (1) [A and B are each a substituted or unsubstituted monovalent aromatic group or a substituted or unsubstituted monovalent heterocyclic group; R<SB>1</SB>is H, a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group; and X is -CR<SB>2</SB>= (R<SB>2</SB>is H or a substituent) or N]. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
