Patent ID: 6511171
Filing Date: 2003-01-28
Classification: C09D

Abstract:
An ink set for ink-jet recording, comprising:a first group of inks exhibiting a first hue and having different color densities and containing a colorant, water-soluble organic solvent and water, wherein among the group of inks, an ink has a largest surface tension &sgr;1 and another ink has a smallest surface tension &sgr;2, and said &sgr;1 and said &sgr;2 satisfy the following conditional formula: &sgr;2/&sgr;1>0.7, and â€ƒwherein at least one-of the inks contains iron ions, magnesium ions and calcium ions such that a total amount of the iron ions, the magnesium ions and the calcium ions is not more than 10 ppm by weight.