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The design is easy to distinguish the key between front and back by two different colors. The design dye the keys two different colors (green and red) with phosphorescent light-emitting material on both sides. This material is excellent Indication function in low-light environment, When the luminescent powder material on the surface adopts the visible light 10-20 minutes, it can continue give out light in the dark (eg at night) more than 12 hours. The design provides a convenient to users to identify the front or back of the key quickly, especially in the dark (eg at night). Meanwhile, a variety of colors also have a decorative function.
Guangdong Ocean University