Plain White Thermal Paper Roll is a fine paper roll 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 is very safe and easy to use. Plain White Thermal Paper Roll products are utilized in the retail, banking, government, and hospitality industries for thermal printers, and credit card terminals. Thermal paper is a form of paper with a chemical coating on one side.