Proč termální tiskárny tisknou prázdný papír?

First, thermal paper. It must be thermal paper. You can't print words on plain paper. If the thermal paper is clearly used and still cannot print, you can check whether the thermal paper is installed backwards. Only one side of the thermal paper can be printed, which is relatively smooth. When you scratch it with your fingernail, there are black scratches. This trick can also be used to determine whether it is plain paper or thermal paper.

Second, hot weather. The thermal sheet must be exposed to high temperature before the thermal paper can react chemically and print out the content. Of course, you can't directly touch the thermal film with your hands, it will burn your hands. If the thermal paper is used and installed correctly, the characters still cannot be printed, or the printed handwriting is blurred, it may be that the thermal head is damaged, you can wipe it with alcohol to see if it can be improved. If it is still blurry, most of the thermal pads are broken and need to be replaced.