Marked cards tricks

Poker cards players like to use playing cards tricks in games. Marked cards tricks are one of the most convenient playing cards tricks that you can use easily in poker games.
We have tricks to do with marked cards, that is invisible ink to mark cards. Naked eyes cannot see through poker marked cards while infrared contact lenses can read its luminous ink marks. The secret of marked cards is here, simple and easy to operate.
These marked cards tricks are widely used in poker games or magic performance.