How to determine if a small roll of thermal label paper has expired?

There are several methods to determine whether a small roll of thermal label paper has expired:

Observe the appearance:

Expired thermal paper may turn yellow, brittle, or have a rough surface due to prolonged storage.

The texture and glossiness of paper may also change, becoming less smooth and bright than new paper.

Check the printing effect:

When using a printer to print, observe whether the printed text is clear and complete.

If the handwriting is blurry, the color is uneven, or easily fades, this may be a sign of expired thermal paper.

Compare retention period:

Check the production date and shelf life on the packaging or label of the thermal paper.

If the shelf life has expired, the paper may have already expired.

Through professional testing:

If conditions permit, professional testing instruments can be used to measure the sensitivity and reaction speed of thermal paper.

Expired thermal paper may exhibit decreased performance in these areas.

Reference experience:

Based on past usage experience, if thermal paper frequently experiences problems such as paper jams and unclear printing during the printing process, it may also be a sign of paper expiration.

Environmental assessment:

If thermal paper is stored in a high-temperature, humid, or direct sunlight environment, its shelf life may be shortened.

Thermal paper stored in this environment is more prone to expiration.

Please note that the above methods are for reference only and cannot accurately determine whether the thermal paper has expired. To ensure the best printing effect and shelf life, it is recommended to follow the manufacturer's recommendations and storage conditions when using thermal paper, and use the paper within its shelf life. If you suspect that the paper has expired or its quality has declined, it is recommended to conduct a printing test or consult a professional for advice.