How thermal paper works?

Thermal paper is thermal printing paper, thermal fax paper, used for thermal printer and thermal fax machine, its quality directly affects the print quality and storage time, and even affects the service life of printer and fax machine.

Thermal paper is a special kind of coated paper; its appearance is similar to normal paper. The thermal paper surface is smooth, as the paper is made up of ordinary paper, top layer coating thermal hair color layer, coated on one side of the surface of ordinary paper, hair color layer is composed of an adhesive, chromogenic agent, colorless dye (or leuco dye), not to be separated, microcapsule chemical reactions in a state of "latent." When encountered thermal paper hot print head, printed by the print head of chromogenic agent react with colorless dye namely and discoloration, formed by.



The handwriting generated by fax or printing on thermal paper is unstable and will fade naturally. The reason is that the color reaction of thermal paper is reversible. The colored product will decompose by itself to different degrees. The color of the writing will fade gradually and gradually until the writing completely disappears on the white paper. Therefore, it will accelerate the decomposition of color products and accelerate the fading of text and text under the action of external conditions such as a long time for placing, long time for illumination, long time for heating, and under the action of external conditions such as high ambient temperature, moist environment, and contact adhesive paper. Of course, the fading speed also relates to thermal paper's thermal-sensitive materials.