What are the precautions when buying cash register paper?

Thermal paper is specially used for printing paper on thermal printers. Its quality directly affects the printing quality and storage time, and even affects the service life of printers and fax machines. The thermal paper on the market is mixed, and many users do not know how to identify the quality of thermal paper, which provides convenience for many businesses to manufacture and sell low-quality thermal paper, causing losses to users, shortening the light storage time, and blurred handwriting , severely damaged the printer. This article tells you how to identify the pros and cons of thermal paper.

Thermal printing 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 thermal coating or protective layer mainly affects its quality.

If the coating of the thermal paper is not uniform, it will cause the printing to be dark in some places and light in some places, and the printing quality will be significantly reduced. If the chemical formula of the thermal coating is unreasonable, the storage time of the printing paper will be changed. Very short, good printing paper can be stored for 5 years after printing (under the condition of normal temperature and avoid direct sunlight), and there is also a long-lasting thermal paper that can be stored for 10 years, but if the formula of the thermal coating is unreasonable, May only be kept for a few months.

The protective coating is also critical for the storage time after printing. It can absorb part of the light that causes the thermal coating to react chemically, slow down the deterioration of the printing paper, and protect the thermal components of the printer from damage, but if the protective coating The uneven layer will not only greatly reduce the protection of the thermal coating, but even the fine particles of the protective coating will fall off during the printing process, rubbing the thermal components of the printer, resulting in damage to the thermal components of the printing.

Thermal paper is generally sold in the form of rolls, generally 80mm×Φ60mm, 57mm×Φ50mm and other specifications are the most common, the front number represents the width of the paper roll, the back is the diameter, and the width is generally 1 or 2mm. Printers generally cannot print on the edge, but the diameter of the paper roll has a greater impact on the purchaser, because the total length of the paper roll is directly related to the cost-effectiveness of the paper roll. If the diameter is 60mm, but the actual If it is only 58mm, the length of a roll of paper will be reduced by about 1 meter (the specific reduction depends on the thickness of the paper), but the thermal paper rolls sold on the market are generally marked with X0, and the actual diameter is often less than X0. It is also necessary to pay attention to the diameter of the core in the middle of a roll of paper. Some businesses will also make manipulations on the core, and choose a larger core, and the length of the paper will be much shorter. The simple way is that the purchaser can bring a small ruler to measure whether the diameter is consistent with the diameter marked on the packaging box. The diameter of the tube core also needs to be paid attention to, so as not to be deceived by the unscrupulous merchants.