Thermal printing (or direct thermal printing) is a digital printing process that produces a printed image bypassing paper with a thermochromic coating, commonly known as thermal paper, over a print head consisting of tiny electrically heated elements. The coating turns black in the areas where it is heated, producing an image.

Most thermal printers are monochrome (black and white) although some two-color designs exist.

Thermal transfer printing is a different method, using plain paper with a heat-sensitive ribbon instead of heat-sensitive paper, but using similar print heads.

Product Features:

• Model: RP203
• Printing Method: Thermal Paper
• Width: 57.5mm
• Paper Diameter: 55mm
• Resolution: 203DPI
• Printing Speed: Up to 90mm/s
• BarcodeSupported: 125,UPC-A,UPC-E,EAN-8,EAN-13,Codebar, Code39,Code93,Code128,Code11,MSI
• Font: ASCII(12x24)
• Graphic printing: Direct bitmap printing
• Paper Sensor: Photo-sensor
• Head temperature detection: Thermistor
• Communication Interface: RS232 or RS232 with TTL level
• Power supply: 12V/3A MAX.
• Head Life: 50km
• Printing width: 48mm
• Operation condition: 5~45℃，20~90%RH(40℃)
• Storage condition: -40~60℃，20~93%RH(40℃)

Product Datasheet:

https://5.imimg.com/data5/SA/LQ/AY/SELLER-1833510/thermal-printer.pdf