The principle and method of using thermal printing paper to restore the words on thermal printing paper The main reason why the words on thermal printing paper disappear is because of the influence of light, but there are also comprehensive factors, such as time and the ambient temperature of contact. Although the words have disappeared, the thermal paper still retains its original characteristics. As long as it still retains its characteristics, we can use the method of constant temperature heating to restore the words. Put the thermal printing paper in a constant temperature box, use the constant temperature box to heat it, and wait for a while, the words will be restored. It will not be just white words on a black background, which is different from the black words on a white background we saw before.
The specific operation method of restoring the words on thermal paper by constant temperature heating (1) Put the thermal printing paper with faded words into the constant temperature box. (2) Turn off the constant temperature box and control the temperature scale of the constant temperature box. Adjust the temperature to 75℃ to 100℃.
(3) Wait for 10 minutes. After the thermal printing paper is heated in the constant temperature box, a chemical reaction will occur. The result is that the original handwriting is white and the original blank space becomes black. In this way, we can see what we have recorded.
(4) If we cannot see the handwriting clearly, we can use a high-pixel digital camera to image and input it into an electronic computer. This instrument can use color difference to identify it.
Factors that affect the color reaction include the following
(1) Long storage time
(2) Humid environment
(3) High ambient temperature
(4) Contact with alkaline substances
Post time: Aug-07-2024