Industry News

How thermal printer head functions?

November 13, 2019

With the fast development of e-commerce,food delivery, POS Payments, and logistics express, the use of thermal printers have become wider and wider. Acturelly, you can find thermal printers almost everywhere around us.

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We have thermal receipt printer and thermal label barcode printer around the world. But do you know what the principle of thermal printer is? What kind of paper should be used?

The working principle of a thermal printer is that we have a semiconductor heating element on the print head. After the print head heating the thermal paper, you will find text word,graphic,barcodes have been printed on thermal paper. This reaction only happend when at a certain temperature, and high temperature will accelerate this chemical reaction. When the temperature is lower than 60°C, the paper takes a considerable time, even several years, to become dark; When the temperature is 200°C, this reaction will be completed within a few microseconds.


Thermal printer is a conventional receipt printing equipment, which has the advantages of small size, light weight, high speed, low noise, clear printing, convenient use, etc. At present, thermal printers have been widely used in the catering industry, logistics industry, financial industry, medical industry, supermarket chain industry and other fields.

What kind of paper can be used? We need to use thermal receipt/label paper. Why only use thermal paper?

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Because the thermal paper is coated with a thermal chromophoric layer, it is a special coated processed paper. Though its appearance is similar to ordinary white paper, when the thermal paper encounter the heating print head,it will chemically react and change color to form images and texts. Since there are many varieties of leuco dyes, the color can be different, including blue, purple, black and so on.

Shenzhen Hoin Electronic Technology Co., Ltd. is a professional printer manufacturer and service provider in thermal receipt printers and thermal label barcode printers. Welcome to contact us for more professional knowledge.

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