Aluminum coated glass bead is coated with a layer of aluminum on half sphere. It can highly enhance the reflective effect and be widely used for road signs, traffic safety goods, and reflective printing ink, or screen printing, etc. Technical Data Composition TiO2-BaO-SiO2 GLASS Refractive Index 1.930.01Nd Specific Gravity 4.10.2 g/cm3 Color Silver grey Form Fine spheres Semi-coated with aluminum Size 75-90um 65-75um55-65um 40-55um 20-40um10-25um Brightness (Retro-Reflective Coefficient) Grade 1 50-100 Grade H 65-130
