During the production of highway painting, put glass bead into paint based on the ratio of 18-25% (weight percentage), so that the highway paint can still keep reflectivity during wear and friction. The ratio is refer to the specification of Communication Industry Standard of the People's Republic of China No. JT/T280-2004, the standards which is different in different countries and areas. According to the specification of Communication Industry Standard of the People's Republic of China No.GB/T24722-2009, the granulometry is shown in the table below. Ratio:2.4-2.6g/cm3 Reflectivity:≥1.50 Roundness:≥80% Contained ratio of magnetic particlea:≤0.1%
