Invisible ink pen contact lenses
Invisible ink pen contact lenses are special made contact lenses to read marked cards.
For some people, they think buy marked cards from us is too expensive to afford for a long term, they would prefer to buy invisible ink and pen instead. Invisible ink is a marked cards ink that can hidden on the back of playing cards with any marking patterns you want, such as jumbo number on middle and small pips on four corners. After the invisible ink markings get dried, you can check it out with these invisible ink pen contact lenses.
After you wearing invisible ink pen contact lenses, there nothing different from those do not have. And that is why marked cards contact lenses are such popular among poker players. Only you can feel the difference, you can see the invisible markings. Easy, simple and convenient to use and maintain.