Abstract: An oval ring hair brush includes an elongated annular brush base including two linear parts provided between semicircular parts provided at both ends of the brush base and a plurality of pyramidal projections. The linear parts each have an elliptical shape in a section in a transversal direction. The brush base is curved to protrude toward an upper side. The pyramidal projections extend parallel to each other and have equal heights, so that a virtual plane composed of the tips of the pyramidal projections forms a plane parallel to a lower surface of the brush base. A groove part is provided to be continuous in a longitudinal direction from a through hole. The brush base and the pyramidal projections are formed integrally using an elastic material. The hair brush has excellent water drainage performance. The oval ring hair brush has no handle extended from the brush base.

Abstract: A process of fabricating a three-dimensional object from a light curable liquid resin includes irradiating a light to a surface of the light curable liquid resin so as to form successive cross-sectional layers of the cured resin at that surface and to superimpose the successive layers on each other. An improvement resides in that one or more of the successive layers is made to have different portions made through different curing conditions. By providing such cross-sectional layers having different curing conditions, the resulting three-dimensional object can be made into accurate outer configuration without leaving any critical residual stress therein.