Marked cards for magic

Marked cards with invisible ink is widely used in magic shows. The magicians can tell you poker suits and numbers even playing cards facing down. The secret is that they wear luminous color contact lenses for marked deck of cards. That is marked cards trick.
Ultimate Bicycle marked deck is mainly used in magic games as well as poker games. Besides marked Bicycle playing cards, we also have others magic marked card, such as KEM contact lenses marked cards and invisible ink glasses poker Copag, etc.