Many poker players prefer to use KEM Arrow marked playing cards made in USA. In order to satisfy their need, we marked KEM playing cards with luminous invisible ink for many years. As for the invisible ink markings on back of poker cards, the poker players should wear special infrared contact lenses or IR sunglasses to see marking playing cards. Both KEM Arrow Jumbo Index and KEM Arrow Bridge Index can be offered by us. No matter what kind of marked playing cards you need, we can produce that for you. By the way, please take our IR contact lenses or perspective sunglasses as long as you play poker games with this KEM marked cards. Otherwise, you can’t see the marking of cheating playing cards.