Have you ever thought that "how can I make invisible ink which is visible under UV light"? This magic invisible ink pen is originated in China and made of best invisible ink. It is very easy for you to use it to mark playing card.
No matter what kind of material and which brand, our magic luminous ink pen can mark for you according to your requirement. This special contact lenses marked cards invisible pen can mark the card by your hand and mark you want. Usually, it works with marked cards contact lenses or perspective glasses that can see UV ink.
Due to the incredible luminous invisible ink, players can know the number and suit of cards of other players and can easily to predict the result of poker games.