I believe everyone is familiar with thermal paper. Every time I go to a supermarket or restaurant to eat, the "receipt paper" at checkout is what we call thermal paper, but how to correct it The choice of thermal paper? First of all, we must understand the specific structure of thermal paper:
    Thermal paper is generally divided into four layers, the bottom layer is a paper base, the second layer is a thermal coating, the third layer is a thermal multiple layer, and the fourth layer is a protective layer , The main influence on its quality is the heat-sensitive coating and protective layer. The manufacturing principle is to coat a layer of "heat-sensitive paint" (heat-sensitive color change layer) on high-quality base paper. This is also the fundamental difference between thermal paper and ordinary writing paper.
    If the coating of the thermal paper is not uniform, it will cause some places to be dark and some places to be shallow when printing, and the print quality will be significantly reduced. If the chemical formula of the thermal coating is unreasonable , It will cause the storage time of the printing paper to become very short. Good thermal paper can be stored for more than 5 years. If the quality is not good, it may only be stored for a few months. The quality of thermal paper is directly Affect the print quality and storage time, and even affect the service life of the printer.
    Good thermal paper can not only have excellent print quality and longer handwriting retention time, but also effectively avoid paper jams and static electricity, and effectively reduce the burden on copiers and printers. Hurt
    There are also two identification methods. The first is to use fire: use a lighter to heat the back of the paper. The paper with better quality should be black and green after heating (with a little green ), and the color block is uniform. There is also a contrast identification of light irradiation: the printed paper is smeared with a highlighter and then placed in the sun. Which kind of paper turns black fastest, the shorter its storage time.

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