| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pigment ink composition, in particular an inkjet ink composition, capable of achieving excellent coating film resistance and drying properties while suppressing glossiness failure of a coating film. <P>SOLUTION: The ink composition comprises at least a binder resin with an acid value of 10 mgKOH/g or less, a basic dispersing agent, a pigment, and an organic solvent. A ratio (a weight ratio) of the binder resin (A) with an acid value of 10 mgKOH/g or less to the basic dispersing agent (B) is within the following ranges: 0.3≤A/B≤4.0 when a pigment concentration in ink is 3 wt.% or more; and 1.0≤A/B≤25.0 when the pigment concentration in the ink is less than 3 wt.%. <P>COPYRIGHT: (C)2010,JPO&INPIT |
