How to distinguish the quality of three proof thermal paper?

The quality of three proof thermal paper can be identified from the following aspects:

1、 Appearance inspection

Color and Gloss: High quality three proof thermal paper usually has a slight greenish tint, rather than being too pure white. The surface of the paper should have high glossiness and smoothness, uniform coating, and no spots or stripes.

Flatness: The paper should be flat and easy to print, without any warping, raised edges, or unevenness.

2、 Color rendering performance

Color development density and clarity: High quality three proof thermal paper should be able to provide high-density color development and clear handwriting. The color rendering performance can be evaluated by printing test samples.

Preservation: High quality three proof thermal paper handwriting can usually be retained for a long time, such as 2 years or more, and even up to 10 years or more. You can verify its storage performance by reviewing the product description or conducting actual testing.

3、 Three proof performance test

Waterproof test: Soak the printed paper in water for a period of time (such as more than 1 hour), then take it out and observe the changes in the paper and handwriting. High quality three proof thermal paper should be able to maintain good waterproof performance without significant changes in handwriting.

Oil proof test: Apply an appropriate amount of oil substance on the paper and observe the reaction between the paper and the handwriting. High quality three proof thermal paper should be able to resist the erosion of oil substances and maintain clear handwriting.

Scratch resistance test: Use nails or other hard objects to quickly scratch the surface of the paper and observe whether there are obvious scratches left. High quality three proof thermal paper should have strong scratch resistance and no obvious scratches.

4、 Print head adaptability

Poor quality three proof thermal paper may cause wear and tear on the print head and easily adhere to it. Therefore, when making a choice, it is possible to understand the usage experience of other users or conduct actual testing to evaluate their adaptability to the print head.

5、 Other testing methods

Fire baking identification: Use a lighter to heat the back of the paper and observe the reaction of the heat sensitive formula. If the color on the paper after heating is brown, it may indicate that the thermal sensitive formula is not very reasonable, which affects the storage time of printed words.

Comparison and identification of sunlight exposure: Place the printed paper in the sun and observe the speed at which the paper turns black. Usually, paper that darkens faster may have a shorter shelf life. However, please note that this method may vary depending on paper type, environmental factors, etc., and is therefore only for reference.

6、 Brand and certification

Brand selection: Choose well-known brands of three proof thermal paper, which usually have stricter quality control systems and more comprehensive after-sales services.

Certification status: Understand whether the product has passed relevant quality or environmental certifications, such as ISO9001 quality management system certification, RoHS environmental certification, etc. These certifications can serve as an important reference for evaluating product quality.

In summary, identifying the quality of three proof thermal paper requires comprehensive consideration from multiple aspects. By conducting visual inspection, color rendering performance testing, three proof performance testing, print head adaptability evaluation, and other testing methods, combined with brand and certification status, the quality level of three proof thermal paper can be accurately evaluated.