The local news was supposed to do a story on these kinds of tattoos last night but I missed it. I though they looked pretty cool because most of the time they are basically invisible under normal light.
I found this site and it talks about the type of ink needed and how it works and that it has been FDA approved.
Blacklight Tattoos
![Cool 8)](./images/smilies/icon_cool.gif)
By the pricking of my thumb,
Something wicked this way comes.
Open, locks,
Whoever knocks.