Then he was short by more than half a month and long by several months. The fading speed of thermal paper has a great relationship with the environment. With long illumination time and high temperature and humidity, the handwriting on the paper will fade quickly.
Thermal paper is also called thermal fax paper, thermal recording paper and thermal copy paper, which is called thermal copy paper in Taiwan Province Province.
Thermal paper is also called thermal fax paper, thermal recording paper and thermal copy paper. In Taiwan Province Province, it is called thermal paper. Thermal paper is a kind of processed paper. Its manufacturing principle is to coat a "thermal coating" (thermochromic layer) on high-quality base paper. Although there are more than ten kinds of chemicals used in this color-changing layer, there are at least the following compounds: there are many kinds of leuco dyes, and fluorescent compounds are the most commonly used; The chromogenic agent accounts for less than 20%, and bisphenol and p-hydroxybenzoic acid are commonly used; The content of sensitizer is less than 10%, containing benzenesulfonamide compounds; The filler accounts for less than 50%, and calcium carbonate (granules) is commonly used; The binder accounts for less than 10%, such as polyvinyl acetate; Stabilizers such as dibenzoyl terephthalate; Therefore, the process is difficult and the technical requirements are high.