White color particles for display media used for an information display
device, in which particles including at least the white color particles
or liquid powders including at least the white color particles (3W) are
sealed between two substrates 1, 2, at least one substrate being
transparent, and, in which the particles or the liquid powders, to which
an electrostatic field is applied, are made to move so as to display an
image, is characterized in that the improvement is composed of resins
made of methylpentene or cycloolefin and titanium oxide. Moreover, as a
preferred embodiment, a white color reflectance is not less than 40%,
and, the improvement has a heat resistance such that no fusion bond is
detected after the white color particles are sprayed on a glass substrate
heated at 120 .degree. C. and the heating state of the heated glass
substrate is kept for 30 minutes. In this manner, it is possible to
provide the white color particles for display media having an excellent
white color reflectance, a high contrast on the display image and a
sufficient heat resistance.