Reflective powder belongs to high refractive reflective powder. It mainly has retro reflection, which is an optical phenomenon. When light shines on objects such as lenses, it is refracted to gather light, and then reflected from the focus and refracted back to the light source direction through the lens. The product uses aluminum plating on the back half of the high refractive index reflective powder as a retro reflector, which has extremely strong retro reflective performance, and can directly reflect 85% of the light back to the light source, Reflective brightness caused by retro reflection can enable drivers and operators with light source at night to clearly see pedestrians and obstacle targets at night or in poor vision, so as to ensure the safety of both parties.