| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a droplet ejection apparatus having superior discharge stability even when a pigment ink and a dye ink are mixed. <P>SOLUTION: The droplet ejection apparatus includes a head member. The head member is provided with a nozzle surface, a plurality of nozzle arrays including a first nozzle array and a second nozzle array are arranged on the nozzle surface, the nozzle array includes a plurality of nozzle holes which are arranged in a predetermined pattern, the first nozzle array discharges a pigment ink which contains water and a pigment, the second nozzle array discharges a dye ink which contains water and a dye, and the relationship between the conductivity [E<SB POS="POST">1</SB>(mS/cm)] of the pigment ink and the conductivity [E<SB POS="POST">2</SB>(mS/cm)] of the dye ink is expressed by the formula 0<(E<SB POS="POST">2</SB>-E<SB POS="POST">1</SB>)≤3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
