: 79mm X 80mm X 13mm 50 Rolls Per Box

Thermal Paper Coating: Thermal rolls are coated with a heat-sensitive chemical layer that changes color (typically black or blue) when exposed to heat. This is how thermal printers produce text and images without using ink. The thermal coating is often sensitive to light, heat, and chemicals, so the paper should be stored in a cool, dark place to prevent fading or discoloration. Types of Thermal Paper: Direct Thermal Paper: The paper is coated with a heat-sensitive chemical that changes color when exposed to the heat generated by the printer’s printhead. Direct thermal paper is commonly used in receipt printers, barcode label printers, and mobile printing. Thermal Transfer Paper: This type uses a ribbon to transfer ink to the paper. It’s often used for applications that require higher durability, such as shipping labels.