Marked playing cards with invisible ink can be used for poker and magic shows. These cards are marked with special markings which can be seen using certain devices such as infrared contacts or poker sunglasses. These markings can be scanned with the poker analyzer’s scanning camera or phone. The difference between marked cards invisible ink and barcode decks is that the former is easier to use since the marks can be spotted with just a simple device like luminous contact lenses or poker sunglasses, while the latter requires more devices such as a scanning camera, poker analyzer, and smartphone.
Marking cards with invisible markers is a common way to cheat at poker games and magic acts. This method is not foolproof as it can be easily detected by other players. Strong players pay close attention to play and will notice any unusual behavior. The marks are also visible when they come in contact with heat or water, which can change their color. The best way to prevent these types of cheating, is to purchase a high-quality set of cards from a reputable dealer.
In order to mark a deck of playing cards with invisible ink you need to apply a special liquid solution on the surface of each of the cards. The solution is a thin layer that produces a difference in absorption of light. The color component differences that result can be analyzed using pseudo colors. This technique can be used with both UV-active inks and IR-active inks.
Invisible ink used for marking cards is a more advanced form of Steganography. Steganography is the art of hiding information within another medium. It can be applied to hide messages as words, symbols, or numbers on paper. It is used to keep spies safe from their enemies. Invisible ink can be used to create steganography on paper and other surfaces.
There are several ways to mark cards with invisible ink. The most important thing is to use the right type. The ink must be clear and odorless to avoid detection, and it should be easy to read. The best markers are those with a thin coating, and they should be able to withstand a few minutes in the sun.
Some people are skeptical of invisible ink, but it can be used to create a mark that is both clear and readable. Some punters used this trick to cheat at poker tournaments. The host was so shocked that he could not answer their questions. Some punters claim that the host was not cheating despite his expression of shock. In any case, this is a very clever way to beat other punters in the game. It is important to note that these markings remain technically illegal in certain jurisdictions.