Card marking methods such as small details on the back of the cards are obsolete and pros are trained to catch that marking. Usually, cards marking is the process of marked cards, it can be by machine or by hand. Here the topic is about the invisible ink that we can use to mark playing cards, the card marking ink.

The invisible luminous ink is always the new method for cards marking! The name invisible luminous ink has no problems, it's invisible to naked eyes and luminous to the marked cards reader including the infrared contact lenses and sunglasses.