Very great article on Colored Bubbles... A dye that really disappears

[Nifty]

With all the interest in ink longevity it was kinda nice to read an article that was about the search for the completely opposite.

I love Popular Science!

http://www.popsci.com/popsci/science/0a03b5108e097010vgnvcm1000004eecbccdrcrd/4.html