Sep 10, 2009 #17 C cyclonite 0 Joined Sep 16, 2007 Messages 304 Points 0 I've tried the secret markings on credit cards and know it works Trust me, it does.
Sep 11, 2009 #18 Cyparagon 0 Joined Sep 12, 2007 Messages 9,399 Points 113 That's a waste of money, but a good idea. Just dump an old highlighter cartridge in a bit of bubble solution. Fluorescent black lights are around 370nm, far more purple than blu-ray.
That's a waste of money, but a good idea. Just dump an old highlighter cartridge in a bit of bubble solution. Fluorescent black lights are around 370nm, far more purple than blu-ray.
Sep 20, 2009 #19 YEAH 0 Joined Aug 19, 2009 Messages 17 Points 0 what about tonic water? aparrently it glows from the quinine File:Tonic water uv.jpg - Wikibooks, collection of open-content textbooks although it looks like a lot of blacklight has been used
what about tonic water? aparrently it glows from the quinine File:Tonic water uv.jpg - Wikibooks, collection of open-content textbooks although it looks like a lot of blacklight has been used
Sep 20, 2009 #20 Shogoki 0 Joined Aug 14, 2009 Messages 220 Points 0 ^^ was just thinking of tonic too... quinine being the culprit for its UV reactive properties.