Marked Playing Cards With Glasses

Marked playing cards have secret markings on the back that help magicians or poker cheaters identify the suit and number of a card accurately and quickly. These markings can only be seen by specialized scanning cameras, contact lenses or glasses. They are invisible to the naked eyes. These devices, called card readers, are used in magic shows and poker tournaments.

There are many ways to mark a deck of playing cards, but the most popular is by blocking out certain parts of the cards. This can be achieved by colouring or scratching away a small section of the back of the cards. Segments of a card-back can also be made lighter or darker by tinting. This method can be more subtle than blocking and requires skill in executing.

Another way to mark a deck of cards is to add luminous markings that can be read with special glasses. These are usually a mix of chemicals and fruit juice. This technique is not as effective because some cheap solutions can dull the finish of the card-back.

Luminous reading glasses are one of the most useful and practical poker cheating products. These sunglasses look like normal ones so they are hard to suspect by other poker players. These poker glasses have a metal frame and energy-saving lenses so they can be used in different lighting conditions. You can use the luminous lenses by wearing them in front and looking at the backs of the marked cards.