High refractive index glass microsphere / beads is a key raw material for the production of refractive stuff, which mainly include 

refractive film, refractive ink, refractive line-mark paint, refractive cloth, refractive leather, refractive textile band, refractive

security silk, etc.

Refractive stuff is featured by retro- reflection, therefore enjoys high regressive refraction effect without consuming extra energy.  Since it congregates and refracts nearly all the ray of light within a very small angle, its luminance greatly exceeds what the common stuff can achieve. This is the reason why it is widely applied to the fields such as road, harbor, mine, fire department. As a security mark, it highly improves users’ safety reliability.