How to mark Copag 139 deck

Copag 139 playing cards are made of paper, but we can mark Copag 139 poker cards well. Many customers ask us how to mark Copag 139 deck and how to make a deck. We apply invisible ink to marked cards by printing machine, which also need technology. Not everyone can use this way to mark cards.
However, we also have luminous ink kit for marking cards. You can mark cards by hand at home. After finishing marking with invisible ink, you can use infrared contact lenses to detect Copag 139 marked deck.