Patent ID: 8241414
Filing Date: 2012-08-14
Classification: C09D

Abstract:
1. A water-based ink for ink-jet recording, comprising: a pigment; water; an anionic surfactant represented by the following general formula (1); and complex salt forming an anionic zirconium complex ion: where in the general formula (1), R represents a hydrophobic group, X − represents an anionic group, M + represents an alkali metal ion, an ammonium ion, or a quaternary ammonium ion, and n represents an integer of 1 to 30; wherein the anionic zirconium complex ion is [Zr(CO wherein the amount of the anionic surfactant represented by the general formula (1) to be added relative to the total amount of the water-based ink in the range from about 0.05 wt % to about 0.15 wt %; and wherein the solid content of the complex salt relative to the total amount of the water-based ink is in the range from about 0.1 wt % to about 0.8 wt %.