How to test the moisture resistance of color thermal label paper?

Testing the moisture resistance of color thermal label paper can be done in a variety of ways, the following are some common test methods:

1. Water test

This is the easiest and most direct way to test. You can use a watering can to spray water on the color thermal label paper, and then observe the water seepage on the surface of the paper. If there is no water seepage or fuzzy phenomenon on the surface of the paper, it indicates that its moisture-proof performance is good.

2. Immersion test

Soak a sample of color thermal label paper in water for a period of time (for example, 30 minutes or 1 hour), then remove it and observe how it changes. If the paper remains clear after soaking, does not fade, does not blur, and can dry quickly without deformation, then its moisture resistance is better.

3. Humidity box test

Use a constant temperature and humidity box to place the color thermal label paper in a high humidity environment (such as humidity above 80%), keep it for a period of time (such as 24 hours or 48 hours), and then take it out and observe its change. If the paper still remains clear, does not fade, does not blur in a high humidity environment, and the physical properties (such as adhesion, tear resistance) has not decreased significantly, then its moisture resistance is better.

4. Waterproof performance rating test

According to standards such as GB/T 28210-2011, the waterproof performance of color thermal label paper can be rated and tested. This test usually involves subjecting a paper sample to specific conditions (such as a certain temperature and humidity), then observing its performance against water resistance, and rating it according to the standard.

5. Practical application test

The color thermal label paper is applied to the actual outdoor or humid environment to observe its change over a period of time. Although this test method takes a long time, it can more truly reflect the moisture-proof performance of the label paper in actual use.

Matters needing attention

When testing moisture resistance, note the following:

Ensure the consistency and repeatability of test conditions, so that test results can be accurately compared and analyzed.

According to the actual application scenarios and requirements of color thermal label paper, the appropriate test methods and standards are selected.

During the testing process, test conditions and test results should be recorded in detail for subsequent analysis and improvement.

In summary, the moisture resistance of color thermal label paper can be tested by a variety of methods, including water spray test, immersion test, humidity box test, waterproof performance rating test and practical application test. Each of these methods has its advantages and disadvantages, and the appropriate test scheme can be selected according to the specific needs.