PROCESS FOR COLORING EPOXY PLASTIC EYEGLASS FRAMES AND PARTS THEREOF

摘要

A process for coloring epoxy plastic resins for eyeglass frames and parts thereof adds dyes or pigments to one or more of the liquid resin precursors or the liquid hardeners immediately prior to casting. Variegated patterns and other color effects may be made by metering two or more colors together with the resin precursors at the casting operation. Translucent colors are made by using solvent soluble dyes added to the resin precursors, opaque colors may be made by adding pigments to the precursors, and demi-shades are made by bleaching the dye cured resin at certain areas of the frames by exposure by heat or ultraviolet radiation.