The Glass beads are used for road marking paints and thermoplastic to provide excellent night retro-reflectivity .When the headlight shines on the road line ,the light is reflected by the glass beads ,and then the driver can drive the car in the correct way. Usually ,the rate of glass beads in paint is 15%--25%,used for intermix and drop-on , we can produce all kinds of glass bead from 30um to 3000um,including uncoated glass bead ,coated glass bead with silicon or silane according to the AASHTO M247, BS6088, EN1423&1424, AS2009, and customer requirements. The specific gravity:2.4-2.6(g/cm3) Refractive index:1.4-1.6. Packing: Double-deck package, the inner is polythene film and its thickness is not less than 0.5mm, the outer is plastic woven bag to prevent leak or damp 1) N.W.: 25 kg/bag 2) N.W.: 1,000 kg/bag 3) Or according to clients\'\' requirement