How to check the quality of thermal paper

It is very important to identify the quality of thermal paper. If you do not know how to distinguish between good and bad quality, you are likely to buy poor-quality products at a higher price. So, how can we use a simple method to detect the quality of thermal paper rolls without professionals and professional equipment to detect them? The following article will tell you several methods for testing the quality of thermal paper.

1. Appearance inspection quality

A good thermal paper should be slightly green, smooth, even, and flawless. If the paper is very white and seems to reflect light strongly, it means too much phosphor has been added, and the quality is very poor. The heat-sensitive layer is uneven and opaque if the paper finish is not high or looks uneven. The printing effect may be unclear or blurry.

Good thermal paper can withstand heat induction at a certain temperature and maintain the paper structure without deformation under high-temperature conditions. Good thermal paper will not be left in the sun for a long time, causing the paper to turn yellow and dark. Apply it with a highlighter and put it in the sun. If the paper turns black quickly, it is of poor quality and has a short storage time.

2. Fire roasting to test quality

Use a lighter to heat the back of the thermal paper in a safe place. If the color of the paper is brown, poor-quality paper will have a shorter storage time. After heating, good thermal paper will appear black (with a little green). If there are many small white spots on the black block in the heated part of the paper or the color blocks are uneven, the paper quality is poor, and the paper is rough and unevenly coated. Good thermal paper will have uniform color patches after heating, and the color will diverge from the center to the surrounding areas and become lighter.

3. Printing effect testing quality

Good thermal paper can print out writing and images. Good color thermal paper prints full colors without color difference or fading. It can accurately restore the color of images, and the printed text and patterns can be stored for a long time. Time is not easy to fade and fade. The paper quality is poor if the printed writing and patterns are blurry or unclear.

Good thermal paper should be flat and not deformed during printing. The paper quality is poor if the paper is curled or wrinkled during printing.

Based on the above tests and descriptions, we can initially judge the quality of thermal paper. Of course, the most accurate identification method is to judge based on the needs of actual use scenarios and feedback results. It can also be judged by testing the composition of the paper through a professional organization.

If you have any questions about testing the quality of paper rolls, please feel free to consult our professionals.