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:
Contained ratio of magnetic particlea：≤0.1%
The appearance of glass bead should be colorless, loosen and spherical particle,
should be clean without impurity, and without agglomeration
The glass bead can be produced based on the standard of countries or areas,
such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.