Invisible Ink Pen for Cards Marking

We have known back marked cards at cards gambling. In order to meet more people’s needs, we offer invisible ink pen to mark cards by themselves. If you want to do like this, I will share this magic pen with you. 
The invisible ink pen looks like a regular pen from its appearance. After dried, the invisible ink filled in the pen will unreadable from our naked eyes. Used for cards marking, the pen can mark numbers or letters on the back of cards. The cards marked by the pen are called invisible ink marked cards that are useful for poker gambling cheat. These marked cards can be read by our special IR contact lenses or IR sunglasses reading. With the invisible ink pen, you can mark cards at any time you want, and it is unnecessary for you to buy marked cards from other suppliers so that you can save a lot of money. At poker games, it is a great success for you to use the marked cards, and winning will become easier. 
If you are interested in marking cards by yourselves, please don’t hesitate to contact us for more details about cards marking by a pen!