IR3 marked cards are the most advanced marked cards developed by Golden Sunshine.
Can you mark your own cards? The answer is yes. Golden Sunshine offers you the invisible ink to make your own unique marked playing cards. You can write marks on the cards both in paper and plastic. UV and IR invisible ink are available now. The marks printed by hand are different from those printed by printers. Hand-made marks can last at most for 25-30 minutes while those marked by printers can maintain as long as 2 years.
This special invisible ink is expensive but very useful. How to mark the cards? First, apply a little ink on the surface of the decks. Second, wait till the ink gets dried. Then you will see the marks you made personally with our special contact lenses and sunglasses. IR invisible ink is in dark blue while UV is in red.
The invisible ink’s features:
1. IR invisible ink is in dark blue while UV is in red.
2. Both IR invisible ink and UV smell tasteless
3. The marks can maintain 25-30 minutes.