How to judge the quality of the heat-sensitive label paper?

Judging the quality of the heat-sensitive label paper can be carried out from the following aspects:

1.Appearance inspection:

Observe the color of the paper. Good quality thermal paper should be slightly green, if the paper is too white, may add too much fluorescent agent, is a jerry-cut product.

Check the paper for finish and reflected light. If the finish is not high or the reflected light is too strong, it may mean that too much phosphor has been added, and such paper quality may be poor.

2.Waterproof test:

Soak the printed paper completely in water for at least an hour. After removing the paper, observe the paper and handwriting for changes. If the paper is not affected at all, there is no change in the handwriting, it may be a real three-proof paper.

3.Heating test:

Use a fire source (such as a lighter) to heat the back of the paper and observe the color change of the heated part. If the color changes evenly and gradually fades from the center to the periphery, and finally appears black and green, it indicates that the product quality is good. If the color turns brown after heating or there are small streaks and uneven color blocks, it may indicate that the thermal sensitive formula is unreasonable or the coating is not uniform.

4.Scratch test:

Run your fingernail quickly and vigorously across the paper. Due to the thick coating of the three-proof paper, scratches are usually not obvious. If the scratch is obvious, it may be a poor quality product.

5.Mechanical strength test:

The mechanical strength of paper such as puncture resistance and scratch resistance can be tested by means of needle puncture test and scratch resistance test. These tests are able to assess the durability of the three resistant thermal paper in different use environments.

6.Durability evaluation:

The service life and stability in different environments are simulated by thermal aging test and wet thermal aging test to determine the durability of the three heat-resistant paper. These tests help to understand how the paper performs under a variety of conditions.

7.Other test items:

It can also detect the fragility, printing effect and consumable loss of the three heat-resistant paper to ensure its stability and reliability in practical applications.

In summary, through the appearance inspection, waterproof test, heating test, scratch test, mechanical strength test, durability evaluation and other relevant testing items, you can comprehensively evaluate the quality of the three heat-resistant label paper. These testing methods can help users choose high-quality products to meet their actual needs.