Recently, many customers ask if they can mark the playing cards by themselves. Yes, of course. Everyone can make marked cards if he gets related kits, like invisible ink or invisible ink pens. Our company offers several kinds of invisible ink pens of high quality for you customers to experience the pleasure of making marked cards by yourselves. We have invisible ink pens for IR or UV contact lenses and IR camera. To make sure the marks cannot be seen by naked eyes, we strongly recommend that you customize marked cards in our company, because we have professional technicians to mark poker cards with special machine. The quality of marked cards made by machine is much better than that marked by hands. If you want to know more about invisible ink pens, please do feel free to contact with us.