disclosed are molded plastic parts particularly eyeglass frame components , the centrifugal spin - casting of such parts and mold apparatus for producing such parts . also disclosed are flexible molds for spin - casting eyeglass fronts and temples . in accordance with one aspect of the invention , the plastic parts are made from a resin system or mixture in liquid form comprising an epoxy resin , a curing agent therefore and an ultra - violet absorber and / or an antioxidant . dgeba - type epoxy resins and polyoxypropylenediamine curing agents are the disclosed preferred epoxy resin and curing agent .