1. Color. Try to avoid choosing blue glass beads and white glass beads.
2. Rounding rate, which directly affects the regression reflection ability of marking. Simply put, the higher the roundness of glass beads, the better the reflective performance.
3. Transparency: the higher the transparency of glass beads, the less impurities, the less energy lost when light enters the glass beads and refracts back, and the better the reflection.
4. Refractive index, the higher the refractive index, the better the reflective effect. According to different particle sizes, gbt24722-2009 can be divided into low refractive index glass beads (1.50 ≤ RI < 1.70), medium refractive index glass beads (1.70 ≤ RI < 1.90) and high refractive index glass beads (RI ≥ 1.90). At present, the refractive index of glass beads commonly used in road markings in China is generally about 1.50, while the glass beads used in reflective signs are generally up to 1.90. It can be distinguished by observing the reflective brightness of signs and markings at night.
 5. Glass bead coating, different road marking coatings should choose the appropriate coated glass bead. The two-component surface bead is coated with silane coupling agent; The hot melting makes the surface sprinkled with glass beads and coated with silicone oil; The best choice is to sprinkle glass beads on the water-based marking surface without coating. If the choice of surface scattering glass beads is wrong, the adhesion between glass beads and markings will decrease.