It is a specially customized thermal paper roll with a length of 78 mm and a width of 75 mm. These papers are used for printing on various point-of-sale (POS) systems and receipt printers. This paper is coated with a heat-sensitive material that changes color when exposed to heat. And the information is printed on the paper by heat application of ink or toner. This thermal paper is widely used in retail stores, restaurants, gas stations, and various businesses.