Here is how:
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- First, you take the tape and fold it on the ends, so it pulls off easily.
- Then take the first piece of tape, put it over the camera flash on the back of your phone. Color that tape blue. Repeat this step again.
- After you’ve put both layers of tape onto the flash or light of your camera, put the third and final layer on top of that one. This is where you pull out your purple Sharpie and paint that sucker in. Go crazy.
This nifty DIY ultraviolet light has lots of practical and fun uses. Eg: Counterfeit bills can be easily detected with a black light. Plastic security threads will appear under UV light in legitimate bills. Additionally, the threads will glow different colors depending on denomination. For instance, a $5 bill will be blue, a $20 bill shows up green and a $100 note glows pink.
Your DIY black light can also be helpful if you have any pets. Sometimes accidents happen, and it can be difficult to identify the exact spot. A black light, however, will quickly illuminate the problem.
Here is the video: