Thermal printers use thermal printing technology, that is, they use special thermal paper, which undergoes a chemical reaction at high temperature and changes color to achieve the printing effect. Compared with dot matrix printers, thermal printing has the advantages of fast speed, low noise, clear printing, and easy use. However, thermal printers cannot directly print double copies, and the printed documents cannot be preserved permanently, so how long can the handwriting of a thermal printer last?

Generally speaking, if it is at room temperature and without direct sunlight, the handwriting of a thermal printer can last for about 2-3 years. If you want the handwriting to last longer, you need to choose better quality thermal paper. Currently, there is thermal paper on the market that can last for 10 years. However, if you buy poor quality thermal paper and the formula of its thermal coating is unreasonable, the handwriting may only be preserved for a few months.