Application scope of thermal paper

What are the uses of thermal cashier paper?

First of all, we should understand that this paper is widely used in hotel catering system, shopping mall POS terminal system, telecommunications system, medical system, banking system and other fields. Its manufacturing principle is mainly to coat ordinary paper with fine powder, which is mainly composed of leuco dye phenol or other acidic substances with a film in the middle. Under the condition of heating, the film melts and the powder is mixed to form a color reaction. Moreover, thermal paper is generally divided into three layers, the bottom layer is the paper base, the second layer is the thermal coating, and the third layer is the protective layer. The heat-sensitive coating or protective layer mainly affects its quality. If the coating of thermal cashier paper is uneven, it will lead to different shades of printing color when printing; If the chemical formula of the coating of the thermal cashier paper is unreasonable, the storage time of the thermal cashier paper after printing will be shortened, and the protective layer is also very important for the storage time after printing, which can absorb some light that causes the chemical reaction of the thermal cashier paper and slow down the deterioration of the thermal cashier paper. When using thermal paper, it should be noted that the color handwriting on thermal paper is unstable and easy to fade, which makes it difficult to identify the contents of the document. Our commonly used lottery tickets are generally heat-sensitive cashier paper.

How to choose thermal cashier paper correctly?

First of all, you should carefully observe the appearance of the paper. If you find that the paper is very white, you should pay attention to it, because if the paper is generally too white, it is because the protective coating and thermal coating are unreasonable and too much phosphor is added. Better paper should be slightly green. The smoothness of the paper is not high or it looks uneven, indicating that the coating of the paper is uneven. If the paper looks strong under the reflected light, the quality is not very good if the phosphor is added too much. Secondly, you can choose to bake with fire, that is, you heat the back of the paper with a lighter. If the color of the paper after heating is brown, it means that the heat-sensitive formula is unreasonable and the storage time may be short. If the black part of the paper has fine stripes or uneven color patches, the coating is uneven. Good quality paper should be dark green (with a little green) after heating, with uniform color blocks, and the color gradually fades from the center to the periphery. Even you can sometimes compare and identify printed paper by sunlight. After smearing with a fluorescent pen and drying in the sun, which paper turns black the fastest means that it can be stored for a shorter time.

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