Only when integrating glass beads of good optical quality,road markings become a clearly visible safety factor at night. The glass beads are applied to pavement marking materials in one of three ways. They can be premixed in marking materials before application, or they can be dropped or sprayed into the wet paint directly behind the paint sprayer, or a portion can be dropped onto premixed two-part epoxy or thermoplastic materials. The top surface of beads is enveloped by the paint, with the wicking action of the paint rising up to above the midpoint of the bead. This provides two actions. It locks the glass beads into the paint and allows the paint to act as a diffuse reflecting surface for retroreflection, with the paint color affecting the color of the retroreflected light. The light entering the glass bead is bent and focused towards the back of the bead and reflected back out towards the headlights and driver.
Appearance: Clean, transparent, no obvious impurity
Composition: Soda lime glass
Density: 2.4-2.6g/cm3
Refractive index: 1.7
Roundness: 80% (600< Sieve size< 850um,spherical beads>80%)
Content SiO2 >68%
Hardness (Moh's): 5-7
According to clients' requirement.