The waterproof and anti-fading properties of text and images printed by Thermal Printer vary depending on many factors.
In terms of waterproof performance, the content printed by ordinary thermal paper has poor waterproof performance. This is because the imaging principle of thermal paper is to heat the thermal coating on the thermal paper through the thermal print head, so that the thermal coating on the thermal paper undergoes chemical changes to develop color. This coating does not have a waterproof function. When it encounters water, the ink easily spreads, resulting in blurred text and images. However, there are also some special waterproof thermal papers. These papers have been improved in coating or paper material, such as adding a waterproof film to the thermal coating, or using fiber materials with waterproof properties. When printing with this waterproof thermal paper, it can resist water erosion to a certain extent, such as in some outdoor labels or ticket printing used in humid environments, it can maintain the integrity of text and images.
In terms of anti-fading performance, the content printed by ordinary thermal paper is prone to fading under long-term light, high temperature or chemical contact. Because the color after thermal imaging is mainly determined by the chemical reaction products of the thermal coating, these products may decompose or undergo other chemical changes under the above adverse conditions. For example, the color on thermal paper will gradually fade after long exposure to sunlight. However, for some high-quality Thermal Printers and matching thermal papers, the anti-fading performance can be improved by improving the formula of the thermal coating. These specially formulated coatings form more stable colors after printing and can resist the influence of light and chemicals for a certain period of time.
In order to further improve the waterproof and anti-fading performance of the printed content, some post-processing methods can also be used. For example, after printing, the paper is laminated to isolate the external moisture and harmful light by covering it with a layer of transparent plastic film, thereby effectively protecting the text and images. In addition, the use of suitable ink enhancers can also improve the anti-fading performance to a certain extent, so that the printed content can remain relatively stable in a more severe environment. In short, the waterproof and anti-fading performance of the content printed by the Thermal Printer can be improved by various methods such as paper type and post-printing processing.
