Three proof thermal paper

Three-proof thermal paper refers to a thermal paper with waterproof, oil-proof and wear-resistant functions1.It is usually used in occasions that require frequent use and storage, such as supermarket receipts, hospital prescriptions, lottery tickets, etc. Compared with ordinary thermal paper, the storage time of three-proof thermal paper is longer, which can be as long as one year, or even 2-3 years1.The manufacturing principle of thermal paper is to coat a layer of "heat-sensitive paint" (heat-sensitive color-changing layer) on high-quality base paper. When it is stimulated by a certain temperature or ultraviolet rays, its surface will change to form images or characters. The three-proof thermal paper adds the functions of waterproof, oil-proof and wear-resistant on this basis.It should be noted that the storage time of thermal paper is closely related to environmental temperature, humidity and other factors. If it is not stored properly, even if the three-proof thermal paper is used, it may change color, fade or be damaged.