Infrared marked cards is a poker that uses special infrared invisible ink to mark on the back of the poker. The special infrared invisible ink cannot be recognized by the naked eye, and can only be seen by wearing special infrared glasses or contact lenses.
Similar to the principle of a banknote detector, this special infrared invisible ink mark can be seen by using light with a wavelength different from visible light. Thanks to the characteristics of this special infrared invisible ink, infrared marked poker looks just like ordinary poker. Therefore, it is difficult to be found by others in the process of use.
