Thermal paper is a printing paper specially used in thermal printers. Its quality directly affects the printing quality and storage time, and even affects the service life of the printer. The thermal paper on the market is mixed, there is no recognized standard in various countries, 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, light The storage time is shortened, the writing is blurred, and the printer is severely damaged.
This article tells you how to identify the pros and cons of thermal paper, so as not to be fooled again. Thermal printing paper is generally divided into three layers. The bottom layer is the paper base, the second layer is the heat-sensitive coating, and the third layer is the protective layer, which mainly affects the quality of the heat-sensitive coating. layer or protective layer. 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 normal temperature and avoid direct sunlight), and thermal paper that can be stored for 10 years or even longer, but if the formula of the thermal coating is not Reasonably, it can only be kept for a few months or even a few days. 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 generally comes in the form of rolls, generally 80mm × 80mm, 57mm × 50mm and other specifications are the most common, the front number represents the width of the paper roll, the back is the diameter, if the width error is 1mm, it will not affect the use, because the printer generally It can't be printed 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 diameter 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 tube core in the middle of a roll of paper. Some merchants will also do tricks on the tube core, and choose a larger tube 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 also needs to be paid attention to, so as to avoid the lack of money and shortness of the unscrupulous merchants causing the buyers to suffer losses.
How to identify the quality of thermal paper, there are three very simple methods:
First(appearance): If the paper is very white, it means that too much phosphor is added to the protective coating or thermal coating of the paper, and a better paper should be slightly yellowish. A paper that is not smooth or looks uneven is an indication of an uneven coating.
Second (fire): use a lighter to heat the back of the paper. After heating, the color on the paper is brown, indicating that the thermal formula is not reasonable, and the storage time may be relatively short. If the black part of the paper has fine stripes or colors Uneven blocks indicate uneven coating. Better quality paper should be dark-green (with a hint of green) when heated, with a uniform color block that gradually fades from the burning point to the periphery.
Third (sunlight): apply the printed thermal paper with a highlighter (this can speed up the reaction of the thermal coating to light) and put it in the sun. Which kind of paper will turn black the fastest, indicating how long it can be stored shorter.
Hope my explanation is helpful to you.
Post time: Feb-14-2022