How to mark the magic ink on back of marked deck? Marking poker cards with luminous ink pen by ourselves is an interesting thing. Using ink pen to mark the invisible ink marks on the decks is a simple poker cheating method for professional poker players. It not only can allow you to add your own markings on the poker cards but also can help save lots of money and time.
With the marked playing cards invisible ink pen in hand, you can write any markings on the back of both paper playing cards and plastic poker cards. And this infrared invisible ink cannot see by our naked eyes. Only you wear our special infrared contact lenses or perspective sunglasses you can read the invisible ink marks on back of marked cards.