Marked poker cards can be used with card marking ink

Card marking is the process of altering playing cards in a method only apparent to marker or conspirator, such as by bending or adding visible marks to a playing card. This allows different methods for card sharps to cheat or may be used for magic tricks. To be effective, the distinguishing mark or marks must be visible on the obverse sides of the cards, which are normally uniform.
Casinos alter playing cards used at table games before they are sold or given away to prevent cheaters from buying them to cheat at table games.
Card marking ink is often used to cheat when gambling or for card tricks. Many casinos, particularly those in Las Vegas alter the decks of cards they sell to tourists – either by punching holes through the middle of cards or trimming their edges – to prevent cheaters from returning to the game tables after buying the cards and then slipping the favorable cards into their hands when playing.
Marked poker cards can be used regardless of who shuffles and deals the cards. Some more sophisticated marked-cards scams involve additional manipulative skills to steer the infrared marked playing cards into the correct positions once the desired cards have been identified.
Originally shared by www.cards999.com