Best Luminous Invisible Ink Pen
This is not a normal pen for writing but a magic invisible ink pen for secret your word or the markings you want to hide. For example, you can use it to mark the luminous ink markings of both plastic or paper playing cards.
After you marking the ink with this invisible ink pen, the ink is dry quickly. Others around you cannot see anything from the appearance, even they touch the marked cards, but still cannot find any problems from the tactility. However, if you wearing with our marked playing cards contact lenses or luminous ink sunglasses that can see invisible ink can you see the invisible ink marks clearly. One this magic invisible ink pen can mark about 50 decks cards.
If you want to mark playing cards, this invisible ink pen can bring you a lot of benefit.