After the thermal paper is printed, there are several different standards for the shelf life of the thermal paper. The shelf life of the thermal paper used in the supermarket is that it cannot completely disappear within 3 months, and the writing remains clear within 1 month. This also explains why the cashier paper receipts in supermarkets require customers to take the receipts to issue invoices within a month, because the handwriting on the thermal paper becomes unclear after a long time. The fax paper used is fax-type thermal paper, and the printed handwriting is required to be stored for more than half a year. There is also a three-proof special thermal paper for medical use. The shelf life is required to be as long as 2 years under ideal conditions.
So, what should I do if the thermal paper fades after a long time after printing on the thermal paper? How to keep thermal paper from fading?
The answer is that there is no way to recover. After the thermal paper is opened, the oxidation reaction will occur when the paper is placed under the air surface, and the chemical coating of the color developing layer will change, and the color development will become unclear. The thermal paper printed coating belongs to the heat-generating color effect that has already occurred, and it will slowly neutralize with time, air, and external factors, which is an irreversible chemical reaction process.
When we usually use thermal paper, we should use it in advance within the storage period. We are best 5 thermal paper manufacturer & supplier.
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