The use of thermal paper
Thermal paper: on the fax machine as a text and graphics communications carriers, namely as fax paper; medical, surveying system as a recording material, such as ECG paper, thermal paper recording instrument; applied to paper Internet terminal; in commercial activities, used to make marks, sign code (POS), etc., in which the amount of fax paper holds the largest proportion.
Production principle of thermal paper is coated with powder particles on ordinary paper-based component is colorless dye phenol or other acidic substances to the film apart, under heated conditions, the film is melted, mix the powder from the color reaction. Thermal unstable writing paper color, easily fade, causing the file contents illegible.
Lottery commonly are used in thermal paper.
Ordinary thermal paper is not suitable for long-term preservation, but has good thermal paper can save 30 years or even longer.