What is the reason why there is no color in the printing of thermal bill printer

The working principle of thermal bill printer is that a semiconductor heating element is installed on the print head, and the print head can print the required pattern after heating and contacting the thermal printing paper. Its principle is similar to that of thermal fax machine. The image is generated by heating and chemical reaction in the film. This thermal chemical reaction is carried out at a certain temperature. High temperature will accelerate this chemical reaction. When the temperature is lower than 60 ℃, it takes a long time, even several years, for the paper to turn dark; When the temperature is 200 ℃, this reaction will be completed in a few microseconds.

There are generally two reasons why there is no color in the printing of thermal bill printer

First, the print head is worn. Generally, the print head is 50km and 100km

Second, the thermal paper used for printing is of poor quality and uneven coating, which can be replaced with better thermal paper

General thermal bill printers can adjust the printing concentration. For your problem, you can increase the printing concentration, and the color of the printed words will become darker

This problem is very common in the normal use of thermal bill printer. Generally speaking, this situation is mainly related to hardware failure. In case of this problem, we should pay attention to some key parts of thermal bill printer. Here we take the inkjet printer as an example. In case of blurred color and unclear font of the printed matter, the fault can be locked in the nozzle. First, the machine automatically cleans the print head. If it is not successful, wipe the place close to the print head with soft absorbent paper; If the above method still cannot be solved, you have to reinstall the printer driver.