Microcapsule material can be controlled to perform various functions for its unique characteristics by
changing certain environmental conditions, such as mechanical, chemical or electrical factors. In
information-recording field, the applications of pressure-sensitive and heat-sensitive microcapsules
have matured sufficiently. But limited by the size of thermal or pressure print head, these kinds of
microcapsules can not realize the high image resolution printing. Based on microcapsule, as well as
photo-responsive and heat-sensitive techniques, the photo-heat sensitive microcapsule can react quickly
to very wavelength by photo-curing and can record the optical information of high-resolution. In this
paper, a novel photo-heat sensitive microcapsule has been synthesized by interfacial polymerization
method. Some factors that affected the size and distribution of microcapsule had been considered, the
relationship between particle size distribution and the shearing speed was mainly discussed. In order to
eliminate the photographic fog, the microencapsulation of developer was adopted in experiment.
Optical response property of the photo-heat sensitive microcapsule was studied. The relationship curve
between image density and exposing time was obtained. This new generation high resolution recording
material can be used in optically controlled digital image reproduction field.