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How Heat-sensitive Printers Work


The thermal printer has been in use for many years, but it was not used for high quality barcode printing until the early 80. The principle of a thermal printer is that a transparent film is coated on a light-colored material (usually paper) and then heated for a period of time to become dark (usually black and blue). The image is produced by heating the chemical reaction in the membrane. This chemical reaction is carried out at a certain temperature. Thermal Printer High temperatures will accelerate this chemical reaction. When the temperature is less than 60 ℃, the membrane takes a long time, or even a few years, to become dark, and when the temperature is 200 ℃, the reaction is done within a few microseconds.

The working principle of the heat-sensitive printer is that a semiconductor heating element is installed on the printhead, and the printing head can print out the desired pattern after heating and contacting the heat-sensitive printing paper, which is similar to the heat-sensitive fax machine. The image is generated by heating and producing chemical reactions in the membrane. This heat-sensitive printer chemical reaction is carried out at a certain temperature. High temperatures will accelerate this chemical reaction. When the temperature is less than 60 ℃, the paper takes quite a long time, or even a few years to become dark, and when the temperature is 200 ℃, Thermal Printer the reaction is done within a few microseconds.

The heat-sensitive printer is selectively heated in the location of the heat-sensitive paper, resulting in a corresponding graphic. Heating is provided by a small electronic heater on a print head that is contacted with a thermosensitive material. The form of the heater row or strip is logically controlled by the printer and, when driven, produces a graph corresponding to the heating element on the heat-sensitive paper. Thermal Printer Control the same logic circuit of the heating element, while also controlling the feed, so that the whole label or paper can be printed on the graph.

The most popular thermal printer uses a fixed print head with a heated lattice, and the print head shown in the figure has 320 square points, each one of which is 0.25mmx0.25mm. With this dot matrix, the printer can place the print point at any location on the heat-sensitive paper. This technique has been used on paper printers and label printers.

Usually, the feed speed of the thermal printer is used as the evaluation index, that is, the speed is 13mm/s. However, when the label format is optimized, some printers can be twice times faster. This heat-sensitive printer process is simpler and can be made into a portable battery-driven thermal label printer. Thermal Printer Because the format of the thermal printer is flexible, the image is of high quality, speed and low cost, its printed barcode labels are not easy to store in the environment above 60 ℃ or exposed to ultraviolet light (such as direct sunlight) for a long time. Therefore, heat-sensitive barcode labels are usually limited to indoor use.

The principle of a thermal printer is that a transparent film is coated on a light-colored material (usually paper), and the heat-sensitive printer turns the film over for a period of time into a dark color (usually black and blue). The image is produced by heating the chemical reaction in the membrane. Thermal Printer This chemical reaction is carried out at a certain temperature. High temperatures will accelerate this chemical reaction. When the temperature is less than 60 ℃, the membrane takes a long time, or even a few years, to become dark, and when the temperature is 200 ℃, the reaction is done within a few microseconds.