The invisible ink Dal negro Texas Holdem marked poker cards are processed with the invisible marks on the back of playing cards. The marks is unreadable from our naked eyes or camera lens and only the special IR contact lenses can read or detect that luminous ink marks. They can help you enjoy the poker games or magic shows in a very secret way. If you use this kind of marked ir infrared deck of cards in poker games, wearing a pair of infrared ink contact lenses, you can know the suit and number of the poker face of cards even if they face down. Thus you are able to play with more confidence and caution at each poker section and enjoy the poker games a lot.