Now it's quite normal that some people may use the invisible ink marked cards in poker games for cheating in the poker clubs or casinos. It's better that you can take the marked cards reader or detector so as to read the marked playing cards for self-defenses.
The jumbo index Bicycle marked cards are available in red marked decks and blue marked decks here in our company now. Our technicians mark the original US Bicycle playing cards with invisible ink by special machine. We have normal markings and we can also mark the playing cards with invisible ink marks according to your requirements. Only wearing the infrared contact lenses or luminous poker sunglasses, can people see the invisible ink marks of this bicycle marked decks. No people can see any marks of this invisible marked cards.
Just feel free to contact for more information about our magic products.