[Masterkoin]

Looking for some type of Blacklight Reactive Fluorescent Tape that will stick to clothing like tshirts. Needs to be temporary (can't just press something on them ). Any ideas?

 

[CoopersDesignCo]

I'm not really sure where you could find blacklight reflective tape, however, I've heard there are a number of ink manufacturers that have Glow in the Dark ink available.
Here's one:
Glow-In-The-Dark Ink

Also, try this thread:
http://www.t-shirtforums.com/graphics-design-help/t2863.html