How to choose glass beads for producing road marking coatings?

The manufacturer of road marking coatings believes that when producing road marking coatings, attention should be paid to selecting high-quality inner mixed surface sprinkled glass beads, considering factors such as roundness, purity, gradation, refractive index, etc. At the same time, it should be noted that the glass bead treatment process corresponding to different marking coatings should be different, such as the glass beads used for hot melt coatings and water-based coatings, and the glass beads used for two-component marking coatings.
Reasonable selection of glass bead particle size is recommended in the GB/T24722-2009 standard. It is recommended to sprinkle glass beads on the surface as No. 1 beads, with a particle size distribution of 0.106mm to 0.85mm. This type of glass bead still meets the current standards for hot melt marking, but its particle size distribution is too small in coatings such as water-based paint and two-component marking paint that are applied at room temperature. Glass bead size should be reasonably selected based on the drying or curing time of the paint film and the thickness of the paint film.