Juice dust is used to mark playing cards sometimes by people during the game. No infrared sunglasses or invisible ink contact lenses are needed to detect the marks. Because these invisible marks are for people who know the secret only.
An advanced type of daub, it may be used to make an ad hoc juiced deck. Like daub, it also allows a player to mark someone else's deck, on the fly, while being watched. The main advantages of juice dust are that it will not dull the finish of the cards and that it works on both paper and 100% plastic playing cards.