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I have always thought that blacklights are pretty awesome. They really do make things look cool! I’d love to have a miniature blacklight I can carry around with me everywhere I go. So I was stoked when I saw this video.
Video Instructions
All you need is a camera phone with a flash, some tape, and blue and purple Sharpies. Okay, so it doesn’t really turn your phone into a blacklight. Blue and purple visible light is not on the same frequency as the light emitted by a blacklight. But it makes for a pretty cool special effect, doesn’t it? It’d be a fun way to prank friends at parties.
Tankgirl
The backlight one doesn't work as shown in the video. I tried it several times and then redid it again to make sure I was doing it right and it still didn't show anything.