Thanks for the GPI web site link, Robert. I had never seen it.

Has anyone ever seen a chip made with this technology mentioned on the GPI site?

LASER LOCK MATERIAL (Click to view)
Laser Lock, developed by Laser Lock Technologies Inc, is a patented product developed to make products safer. Laser Lock components are mixed with the ink and are revealed as green under an invisible laser beam sent by a special pen.

I had read about it but never heard of it actually being offered to a casino. Supposedly, only a laser of a very specific frequency will excite the ink and make it glow. Could be very effective anti-counterfeit technique.