| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water-based ink which can improve the rubbing resistance of printed products and is excellent in storage stability. <P>SOLUTION: The water-based ink for ink jet recording includes a coloring agent comprising A: an azo pigment having a specific structure, B: a vinylic polymer containing hydrophobic structure units (a) having a specific structure, and hydrophilic structure units (b), and C: a compound represented by the formula (wherein, X<SP POS="POST">1</SP>, X<SP POS="POST">2</SP>, R<SP POS="POST">1</SP>, R<SP POS="POST">2</SP>, R<SP POS="POST">3</SP>, and R<SP POS="POST">4</SP>are each independently H or alkyl, but X<SP POS="POST">1</SP>and X<SP POS="POST">2</SP>are simultaneously not H). <P>COPYRIGHT: (C)2012,JPO&INPIT |
