A microcapsule containing titanium dioxide (TiO2) and halocarbon oil was synthesized via an in situ polymerization using urea, melarnine, and formaldehyde (UM/F) as a wall material to examine its potential application as a microcapsule-based electronic ink display technique. Poly (sodium styrene sulfonate) was used as an anionic polymeric surfactant to stabilize a droplet of the suspension, and easily combined with the UM/F prepolymer through ionic adsorption. The microcapsules obtained had an average diameter and wall thickness of approximately 50 mu m and 500 mu m, respectively. The electrophoretic TiO2 particles in the microcapsules responded to electric fields with a response time of few seconds.