In some way, it’s upgraded based on transparent wallpaper holographic foil, that’s to make it metalized. And on the foil, can make a color printing layer. Besides regular silver and gold, we also can make purple, pink, green, blue, and other color layers. The feature is when viewing from an angle, you can see the foil colors like silver and gold. But can’t see the optical color. When tilt or rotate the metalized wallpaper holographic foil, the optical color appears.