Patent ID: 8003025

Claim:
A production process for a microcapsule composition for electrophoretic displays, wherein the microcapsule composition includes an aqueous medium and microcapsules for the electrophoretic displays, wherein the microcapsules include a shell and an electrophoretic fine particle dispersion that is capsuled in the shell, wherein the electrophoretic fine particle dispersion includes a solvent and electrophoretic fine particles that are dispersed in the solvent; with the production process comprising: a dispersing step of dispersing the electrophoretic fine particles into the solvent to obtain the electrophoretic fine particle dispersion; a microcapsuling step of capsuling the electrophoretic fine particle dispersion into the shell in the presence of the aqueous medium, thereby obtaining a preparation liquid including the microcapsules and the aqueous medium, the preparation liquid having a microcapsule concentration of not more than 15 weight %, a wet classification step of treating the preparation liquid to classify the microcapsules, and a concentration step of reducing the aqueous medium from a dispersion resultant from the classification step, thereby concentrating the dispersion and forming the microcapsule composition, wherein: the composition having a microcapsule content of 30 to 80 weight % is obtained without involving the step of drying the microcapsules.