Development o f Laser Marking F iber and Micro-Marking

Abstract

The micro-printing technology which cannot be read with the n aked eyes is used as one of the imitation preventive measures. We p reviously developed the laser mark ing fiber by kneading the coloring pigments to polyester resin. Using this fiber, the irradiation conditions of YAG laser were examined and the best marking condition was found. It was expected the laser marking fiber which was marked original products info rmation was used effectively to p revent imitation.