Thermal paper is a fine paper that has been coated with a substance that changes color when subjected to heat. It’s found in thermal printers, especially in low-cost or portable devices like adding machines, cash registers, and credit card terminals. It does not require ink cartridges or ribbons, which saves money for retailers. thermal paper is used in credit card machines and portable POS systems. Our high-quality thermal paper roll lasts a long time, and the prints on it do as well.