Blue Keypad Backlight, blue laser etching

Remarks:

For a general backlight silicone keypad made by laser etching, the colors distribution and production just like this.

----First painting layer is in transparent white on the transparent silicone surface.

----Second painting layer is in opaque black or dark gray.

----Laser etching to form the white symbols for backlight.

If use the orange, red, blue(light blue), yellow colors  as the second painting layer, it is very difficult for a good etching effort, due to  these colors are very negative for absorbing the laser ray energy.

After many years engineering/manufacturing experience,  we have good solution.

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