Ink composition containing copper complex colorant

摘要

Disclosed is an ink composition for ink jet recording which is free from precipitation and can realize, on a high level, various properties required of ink compositions for ink jet recording. In a copper complex colorant-containing ink for ink jet recording, the free copper ion concentration of the ink composition is brought to not more than 10 ppm. Preferably, ethylenediaminetetraacetic acid or a salt thereof is used to bring the free copper ion concentration to not more than 10 ppm.