A certain optically variable material is added according to different color change needs, so that the manufactured light box shows two different colors under the external light source or when the built-in light source is turned on. Such material is called colored plate. At present, there are black and white plates, blue and white plates and green and white plates, etc. Especially the first application in the financial industry can better reflect the extension trend of this material. The plate can also combine the self-adhesive transparent colored vinyl film to make it possible to present a variety of colored graphics and also meets the environmental requirements.
Mainly used in internally illuminated signboards and display cards.