Patent ID: 11407911

Abstract:
A water-based ink for ink-jet recording includes: a first resin-dispersed pigment, a second resin-dispersed pigment, and water, wherein the following conditions (1) and (2) are satisfied, Q1≥1.2  Condition (1):Q2<1.2  Condition (2):     D1a: an average particle size (nm) of the first resin-dispersed pigment after being mixed with an aqueous solution of calcium ions;D1p: an average particle size (nm) of the first resin-dispersed pigment after being mixed with pure water;D2a: an average particle size (nm) of the second resin-dispersed pigment after being mixed with an aqueous solution of calcium ions;D2p: an average particle size (nm) of the second resin-dispersed pigment after being mixed with pure water.