pokercardsstud_

pokercardsstud_

Invisible Ink With Glasses

For centuries, people have been using invisible ink to convey secret messages. Typically, invisible ink is only visible under certain conditions like heat or light. Some invisible inks work by using an acid-base, oxidation-reduction or other chemical reaction. Others use…

Card Cheating Devices

Card cheating devices look like smartphones, but they contain software and hardware that can read the markings on cards by using a hidden cam. It can then analyze patterns to give information about a card’s suit or value, which helps…