How to detect invisible ink marked cards?

Quite a lot of guys wonder about this.

Usually for a not so good marked deck, you can try finding the difference with naked eyes or use some special light.

When referring to a good marked deck, the marked cards detector is necessary.

Now you can purchase the Detector glasses to add some defense while playing poker at a house game or event. If you suspect somebody is a little to "lucky" and they seem to always fold at the right times and bet at the right times. Give the game a good sweep through by putting the glasses on for a second and looking at the deck of cards that are being dealt. These detector glasses will expose UV and Infrared marked cards! We include a marked card so that you can see the proof of the detection