Reason 1: Improper print head temperature setting

The printing process of thermal paper is achieved by heating the print head. If the print head temperature is set too low, the printed image will be blurry. This could be caused by incorrect printer settings or temperature fluctuations in the process. The solution is to check the temperature setting in the printer settings and make sure it matches the thermal paper requirements.

Reason 2: Dirty print head

Impurities such as dust and grease on the print head will affect the printing effect and make the printed image blurry. If the print head is not cleaned for a long time, more dirt will accumulate, resulting in a decrease in print quality. The solution is to clean the print head regularly. You can use a professional cleaner or a soft cloth dipped in some alcohol.

Reason 3: Thermal paper is of poor quality

The quality of thermal paper is also an important factor affecting the printing effect. Low-quality thermal paper can easily lead to unclear printing, blurred images and other problems. Choosing high-quality thermal paper can improve printing results. Make sure to purchase thermal paper that meets product standards and requirements.

Reason 4: Improper storage environment of thermal paper

If thermal paper is exposed to high temperatures, high humidity, or direct sunlight, its quality may deteriorate, affecting printing results. The solution is to store thermal paper in a dry environment away from direct sunlight, and replace it with new thermal paper regularly.

To sum up, reasons for unclear printing on thermal paper may include incorrect print head temperature settings, dirty print heads, poor thermal paper quality, and improper thermal paper storage conditions. The clarity of thermal paper prints can be improved by properly adjusting printer settings, cleaning the printhead regularly, selecting high-quality thermal paper, and storing it correctly.