Note that I am curious about this strictly for game protection and information purposes. In no way to I advocate cheating. I have heard and read numerous times about something known as 'magician's ink' or 'daub'. In short, what this substance is supposed to do is allow for an 'invisible' mark to be placed on the surface of cards which only shows up in the infrared wavelengths. One could then, allegedly, acquire a special set of glasses which would allow the wearer to view the marks on the cards. I have also been told that this method would fail in a modern day casino because their cameras are sensitive to infrared light.

So, is any of this true at all? Has anyone ever been caught attempting such a scam in a casino? I am inclinded to believe this is all a big myth simply because I cannot find credible documentation to the contrary and, everything which I can find related to this subject would be so OBVIOUS that no one would dare attempt it in a casino (sticky residue, big ass infrared goggles, etc.).