Shoe (cards) dealer will insert a brightly colored blank plastic card. When this card is drawn it indicates that the current game is the last one before a new shuffle. This helps mitigate player advantage via card counting, as a significant portion (usually about 25 percent) of the full inventory of cards never comes into play. The percentage of cards that are dealt is sometimes called the "penetration". Shoe (cards) A dealing shoe or dealer's shoe is a gaming device, mainly used in casinos, to hold multiple decks of playing cards. The shoe allows for more games to be played by reducing
Optical variable device and the angle the OVD is viewed at. Holograms are a type of OVD. Optical variable device An optical variable device or optically variable device (OVD) is an iridescent image that exhibits various optical effects such as movement or color changes. OVDs cannot be photocopied or scanned, nor can they be accurately replicated or reproduced. The OVD is often used as a security device and anti-counterfeiting measure on money, credit cards and government-issued identification cards. OVDs can be created through a combination of printing and embossing. OVDs are based on diffractive optical structures. This gives cards the appearance of having