Improve the road marking line contrary reflection function. When driving at night, the lamp shines on the marking line with glass bead in it, the ray of lamp is reflected back parallely. So the driver can look at the road clearly and drive safely at night. Type A, used to be dropped on the freshly stripped paint surface on the road, immediate enhanced visibility to night drivers. Type B, used to be mixed with the paint prior to strping the road, are exposed giving the enhanced visibility of road markings International standard: BS6088. Korea: KS. U.S.A.: AASHTO. En1423; En 1424 and so on.