Introduction to infrared marker card
Infrared marker cards are playing cards that are marked on the back of playing cards with special infrared invisible ink. Special infrared contact ink is unrecognizable to the naked eye and can only be seen by wearing special infrared glasses or contact lense.
Similar to the principle of money detector, this special infrared invisible ink mark can be seen by using light with a wavelength different from that of visible light. Due to the characteristics of this special infrared invisible ink, infrared labeled poker looks like ordinary poker. Therefore, it is difficult to be found by others in the process of use.
Each poker with infrared marking is printed with a soft polymer coating. This special protective film can ensure that the mark will not be oxidized or washed away by water. And this protective film will not affect the original feel and color of playing cards.