GLASS BEAD COMPOSITION HAVING REFRACTIVE INDEX OBTAINED BY USING GLASS PIECES AS FLUXES, AND GLASS BEADS HAVING REFRACTIVE INDEX OBTAINED BY USING COARSE GLASS POWDER OF GLASS COMPOSITION

摘要

The present invention relates to a glass composition, which has a refractive index obtained by using glass pieces, also known as glass cullet, as fluxes, and glass beads and specifically to: a glass bead composition which has a refractive index obtained by using glass pieces as fluxes, has high transparency, maintains high retroreflectivity even under a humid condition as well as a dry condition, and particularly has a higher refractive index (nd: 1.6-2.2) than glass beads which have a refractive index of approximately 1.5 and are produced using conventional recycled soda-lime-based coarse glass pieces; and glass beads having a refractive index obtained by using a coarse glass powder of the glass composition.