A pieceIn plural, it is commonly used as synonym for units of banknotes and coins. More of paperSee Banknote paper. More or substrateThe physical media or support on which the image is printed, such as paper, polymer or hybrid, etc. More of 800 mm by 700 mm, on which banknotes are printed. The “sheet to sheet” printing technique is the most widely used in printing of banknotes, but the roller printing technique also exists.