Its emergence came into being with the steady improvement of our living standards. It involved all aspects of our lives, brought us a more convenient life, and also showed the degree of growth of our country's economic level. How much do you know about it - thermal cash register paper?
What is the use of thermal cash register paper?
First of all, we have to understand that this type of paper is widely used in hotel catering systems, shopping mall POS terminal systems, telecommunications systems, medical systems, banking systems and other fields. It is mainly made by applying fine particle powder on plain paper. The components of these powders are mainly leuco dyes such as phenols or other acidic substances, which are separated by a film. Under heat, the film melts and the powder mixes to develop a color reaction. Moreover, the thermal paper is generally divided into three layers, the bottom layer is a paper base, the second layer is a heat-sensitive coating, and the third layer is a protective layer, and the heat-sensitive coating or protective layer is mainly affected by the quality thereof. If the coating of the thermal cash register paper is uneven, the color of the printed printing will be different when printed. If the chemical formula of the coating of the thermal cash register paper is unreasonable, the storage time of the thermal cash register paper will be shortened after printing. The protective layer is also critical for the storage time after printing. It absorbs some of the light that causes the chemical reaction of the heat-sensitive coating to slow down the deterioration of the thermal cash register paper. When using thermal paper, be careful that the color writing on the thermal paper is unstable and easy to fade, making the contents of the document difficult to read. Our commonly used lottery tickets are generally thermal cash register paper.
How to choose the correct thermal cash register paper?
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 this type of paper. Because the paper is too white, it is because the protective coating and the thermal coating are unreasonable, and too much phosphor is added. Better paper should be slightly greenish. The paper finish is not high or looks uneven, indicating that the paper coating is uneven. If the paper looks very reflective, it adds too much phosphor and the quality is not good. Secondly, you can choose to use fire to bake, that is, you use a lighter to heat the back of the paper. If it is heated, the color on the paper is brown, indicating that the heat-sensitive formula is not reasonable, and the storage time may be shorter if the black part of the paper There are small stripes or uneven color patches, indicating uneven coating. The paper of better quality is black green (with a little green) after heating, and the color is even, and the color gradually fades from the center to the periphery. Even if you can use sunlight to compare and identify, print the printed paper with a highlighter and put it in the sun. The paper will turn black at the fastest, indicating that the time can be saved.
We always use thermal paper invisibly, so these common senses will teach us how to easily identify the advantages and disadvantages of thermal cash register paper, and will not easily be fooled by illegal vendors. However, Xiao Bian still wants to remind you that if you want to buy, you must go to a regular shopping mall or website, in order to ensure the quality of the paper, will not affect the health of the body.
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