Cards Marking Ink

Information:
How do you mark poker cards without it being noticed by other poker players or magic viewers? Generally, people like using the luminous ink kit for marking cards, but now we have the new invisible ink kit to mark the poker cards.
So why our new invisible ink kit is the best way to mark cards? Because it is a special compound that burns itself into the cards. It will last the life of the cards and not wear off. Invisible to the naked eyes and perfectly clear to the reader.
Besides, the invisibility of the new invisible ink beats any other technique. Using the cards marking ink to mark cards is quickly and easily. Anyone can do it.
After use the new invsibile ink to mark cards, you can use the luminous ink contact lenses or luminous ink glasses to see the marks, but the marks are invisible to naked eyes.