Backing the cards is a common term used in the gambling industry, particularly in card games like poker and blackjack. It refers to the practice of placing a hidden material (usually a thin plastic film) at the back of the card to provide additional support and visual appeal during the game. Other known synonyms for the term include card coating, card marking, and card protection. The aim of backing the cards is to prevent card creasing and bending, which can give away the identity of the card in play. Additionally, it can also help in improving the durability and lifespan of the cards, enabling them to be used for longer periods.