How does thermal paper develop colorgreatshinepaper2020-08-07T16:42:44+08:00
The production principle of thermal paper is to coat the particulate powder on the ordinary paper base. The active ingredients are phenols or other acidic substances without color dyes, which are separated by the film. Under the precondition of heating, the film melts, the powder mixes to cause a color reaction, and the color writing on the thermal paper is unstable. Easily fade, making the content of the file illegible. When the thermal paper is placed in an environment above 70°C, the thermal coating gradually begins to change color. The root cause of the discoloration needs to start from its active ingredients.
Substandard thermal paper has no clear image, and the storage period of finished products is also very short. It may even lose the printing function and become a normal piece of paper.
Greatshine company always supply high quality thermal paper , with image life more than 5 years. quality and service assured. welcome to visit our factory.