How to measure reflective materials?

Reflective materials, also known as retro reflective materials, are widely used in traffic signs and markings, traffic safety facilities, as well as car license plates, clothing, shoes, hats, and so on.

Reverse reflection technology integrates multiple disciplines and technologies such as optics, materials science, mathematics, and organic chemistry

Among them, reflective film is a very popular type of reflective material.

The variety is very wide. In the ASTM4956 reflective film standard, there are up to 11 types of reflective films.

Traffic sign reflective filmLens embedded (engineering grade) reflective film, lens sealed (high-strength grade) reflective film, microprism reflective film, fluorescent reflective film.