Thermal Printing

Thermal printing (or direct thermal printing) is a digital printingprocess which produces a printed image by selectively heating coatedthermochromic paper, or thermal paper as it is commonly known, when the paper passes over the thermal print head. The coating turns black in the areas where it is heated, producing an image. Two-color direct thermal printers can print both black and an additional color (often red) by applying heat at two different temperatures.

Thermal transfer printing is a related method that uses a heat-sensitive ribbon instead of heat-sensitive paper.

Thermal printing is notable for being the onlyform of (non-embossing) printing which involves no ink.

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