What are marked cards and how do they work?

Marked cards are playing cards printed with invisible ink or barcodes, detectable only with specialized tools like infrared contact lenses, glasses, or poker scanners. These markings allow players to identify card values discreetly during games like poker or blackjack. They are designed to be undetectable to the naked eye, ensuring a strategic advantage. Explore our marked card collection to find the right deck for you.