With the rapid development of public transportation of the whole world as well as people's much stronger desires for a colorful and fashionable world, reflective materials, especially reflective sheeting, have been widely used in different areas in recent years. In the future, there must be a much larger demand for reflective sheeting china all over the world. Reflective materials are the special materials which are made according to the optical principles, and could reflect light back to the light source. The reason why reflective materials could reflect light back to its source is that the majority of reflective materials contain a kind of so called high refractive glass bead. The high refractive glass bead has the ability to reflect light back. There are a lot of reflective materials, such as reflective cloths, reflective membrane and so on. According to the position of the high refractive glass bead, reflective materials could be divided into two groups. One is called exposed reflective materials, while the other is called flat reflective materials. As for exposed reflective materials, the high refractive glass bead is often on the surface of the refractive material and is directly in the air. Generally speaking, the structures of flat reflective sheeting manufacturers are very complicated. As a matter of fact, the reflective materials used on the two sides of highways are all flat reflective materials. Besides, there are many reflective coatings, including road sign reflective materials. Traditional sign materials need a lot of investments. Moreover, they are easily destroyed and not strong in reflecting light, especially in rainy days. However, reflective materials do not have such shortcomings which are able to ensure drivers' safety. Now, countries all pay more attention on the comforts and nice appearances of reflective materials. Reflective materials of more colors are produced. In the past, most reflective materials are in silver. At present, reflective materials in red, yellow, green and blue are all very common. Besides, some reflective cloths are used to make uniforms for cleaners and traffic policemen so as to avoid traffic accidents and improve safety. What's more, 3m reflective sheeting are also widely used in outside advertisement. One of the typical examples is reflective flex banners. In the daytime, they are the same with other normal advertisements. However, in the evening, reflective flex banners are quite different. They are much more bright and clear for visitors to see. Even from a far distance, visitors are able to see the content advertised.