| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a pigment dispersion for a color filter having a high contrast ratio and a low viscosity while satisfying storage stability which can finely disperse an organic pigment.SOLUTION: There is provided a method for producing a pigment dispersion for a color filter, the method comprising the steps of: a first step of preliminarily dispersing a mixture liquid containing an organic pigment treated with an acrylic resin, a water-insoluble dispersant and an organic solvent by a media type disperser filled with media particles under the conditions of an instantaneous driving force of 0.5 to 3 kW/kg and a cumulative driving force of 2 to 12 kWh/kg; and a second step of mainly dispersing the resulting preliminarily dispersed product by a media type disperser filled with media particles having a particle diameter smaller than that of the media particles in the first step. |
