Thermal paper quality identification and detailed analysis

- Jul 08, 2020-

Thermal paper quality identification and detailed analysis


Thermal paper is actually thermal printing paper, thermal fax paper, used in thermal printers and thermal fax machines, its quality directly affects the print quality and storage time, and even affects the life of the printer and fax machine. There are more and more popular and trustworthy brands on the market. 


When buying, whether you go to the mall or purchase online, try to compare the three, if you can buy in boxes, you can achieve the effect of good quality and low price. In structure, thermal printing paper is generally divided into three layers, paper base layer, thermal coating, protective layer, thermal coating and protective layer have a great influence on the final effect. The more uniform the thermal coating, the more uniform the printed color, and the better the visual effect. If the thermal coating is not uniform, it will result in different shades of color and reduced print quality. Whether the chemical formula of the thermal coating is reasonable or not directly affects the storage time of the printing paper. 

Now there is a long-acting thermal paper that can be stored for 10 years. As the suggests, the protective coating plays a protective role. It can absorb some of the light that causes the chemical reaction of the thermal coating, protect the thermal coating, slow down the deterioration of the printing paper, and protect the thermal components of the printer from damage. Three Ways to Identify the Quality of Thermal Paper Appearance: When choosing thermal paper, pay more attention to the appearance of the paper. 


From the color, we can distinguish the quality of its protective coating and thermal coating to a certain extent. If the paper is very white, it means that the protective coating and thermal coating of the paper are unreasonable, and it is likely that too much phosphor is added. If the paper is slightly green, then its quality should be better. If the paper looks smooth and flat, the thermal paper coating is more uniform, otherwise, it means that the paper coating is uneven, which will seriously affect the printing effect. 

At the same time, if the paper seems to have strong reflected light, it is also because too much phosphor is added, it is best not to choose such thermal paper. Contrast identification of sunlight exposure: This method is very simple, just apply the different printed paper with the same highlighter and then expose it to the sun (this can speed up the reaction of the heat-sensitive coating to light), and eventually they will all become black, The longer the time required for blackening, the longer the storage time of this thermal paper. 


Fire roasting: In fact, the method of fire roasting is distinguished from sunlight exposure, and the principle is similar. You can use a lighter to slowly heat the back of the paper. The color of the paper will change with heating. If the final color is brown, it means that the heat-sensitive formula is not reasonable and the storage time may be shorter; if the paper can be seen small Stripes or scattered color patches indicate uneven coating. On the contrary, the better quality thermal paper will eventually appear black-green (with a little green) after heating, and the color block is uniform, and the color gradually fades from the center of the heating to the surroundings.

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