Patent ID: 8651651
Filing Date: 2014-02-18
Classification: C09D

Abstract:
1. An ink jet ink comprising a pigment, a binder resin, water, an organic solvent, and one or more surfactants and satisfying the following requirements (a), (b), and (c): Requirement (a): the ink jet ink has a surface tension in a region defined by Expression (2) when an evaporation rate X defined by Expression (1) is in a range of 0<X(%)≦20, (wherein, γ 0 represents a surface tension (mN/m) of the ink jet ink before evaporation; and γ x represents a surface tension (mN/m) of the ink jet ink at an evaporation rate X % and 0<X(%)≦20); Requirement (b): the ink jet ink contains two or more organic solvents; and a content of an organic solvent of which a sum ΣSP of the hydrogen bonding term and the polarity term of the solubility parameter is 8 MPa Requirement (c): a content of at least one of the surfactants is less than a critical micelle concentration of the surfactant.