| abstract |
Ink having a trace amount of aluminum ions remaining as impurities at the time of manufacture, or ink that may be caused by aluminum ions that are eluted from the material of equipment used and mixed with a trace amount of aluminum ions in the ink. Inkjet ink set that solves problems such as ejection failure. In an ink jet ink set having a plurality of inks independently, each ink contains aluminum ions in a range of 0.1 ppm to 5.0 ppm. An ink jet ink set in which at least one ink contains at least 100 ppm and not more than 10,000 ppm of a chelating agent, and at least one of the inks does not contain a chelating agent. [Selection figure] None |