| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pigmented ink composition, especially an inkjet ink composition, which can achieve excellent film resistive property and drying property while ensuring excellent printing stability. <P>SOLUTION: The ink composition comprises an organic solvent having under a 25°C environment a sound speed of from 1,200 m/s or more to 1,500 m/s or less, a pigment and a binder resin. Furthermore, the ink set containing at least an yellow ink, a magenta ink, a cyan ink and a black ink, is characterized in that this ink set has a difference in the sound speeds between the ink having the fastest speed under a 25°C environment and the ink having the slowest speed under a 25°C environment of 100 m/s or less. <P>COPYRIGHT: (C)2011,JPO&INPIT |
