The principle of the Thermal Portable Label Printer Manufacturer is to cover the light color material (usually paper) with a transparent film, and the film will become dark (POS Printer Supplier, also blue) after heating for a period of time. The image is generated by heating and chemical reaction in the film. This chemical reaction is carried out at a certain temperature. High temperature will accelerate the chemical reaction. When the temperature is lower than 60 ℃, it will take a long time, even several years, for the film to turn dark; when the temperature is 200 ℃, the reaction will be completed in several microseconds.

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The heat sensitive printer selectively heats the heat sensitive paper at a certain position, Fiscal Thermal Printer generating corresponding graphics. Heating is provided by a small electronic heater on the print head in contact with the heat sensitive material. The heater is arranged in the form of square point or strip, which is controlled by the printer logically. When driven, a graph corresponding to the heating element is generated on the thermal paper. The same logic circuit that controls the heating elements, as well as the paper feed, so that graphics can be printed on the entire label or paper.