Patent ID: 7182450
Filing Date: 2007-02-27
Classification: C09D

Abstract:
1. An ink composition used for inkjet recording, comprising: a dispersion medium; particles containing at least a colorant; and a charging regulator that generates charges on the particles, wherein an electric conductivity of the particles in the ink composition is saturated, and wherein the ink composition satisfies the following expression: A represents the electric conductivity of the ink composition; B represents the electric conductivity of the ink composition after removal of the colorant particles from the ink composition; C represents (A−B); Ax represents the electric conductivity of the ink composition after addition of the charging regulator in an amount of 0.01% by mass to the ink composition; Bx represents the electric conductivity of the ink composition after removal of the colorant particles from the ink composition to which the charging regulator was added in an amount of 0.01% by mass: and Cx represents (Ax−Bx).