How to judge the quality of a long-lasting three proof thermal paper?

To judge the quality of a long-lasting three proof thermal paper, you can start from the following aspects:

1、 Appearance inspection

Color and Gloss:

High quality long-lasting three proof thermal paper should have a slight greenish tint instead of being too pure white. If the paper is very white, it may have added too much fluorescent powder, which can affect the quality and printing effect of the paper.

The paper shall have good gloss and smoothness, and the surface shall be flat without defects such as foam and impurities.

Coating uniformity:

Observe whether the coating on the paper is uniform. If the paper surface is not smooth enough or appears uneven, it may be due to uneven coating, which can affect the printing effect.

Thermal paper with uneven coating may have varying shades of color during printing.

2、 Color rendering effect

Color density and clarity:

High quality long-lasting three proof thermal paper should have high-density color rendering and clear handwriting. If the printed text is blurry or the color is light, it may be due to poor quality of the thermal paper.

Save time:

The handwriting of long-lasting three proof thermal paper can usually be maintained for a long time. If the paper has a short storage time and is prone to fading or blurring, it may indicate a quality issue.

3、 Protective performance

Three proof performance:

Long term three proof thermal paper should have the properties of moisture resistance, oil resistance, and scratch resistance. Its protective performance can be verified by applying water, oil, or conducting friction tests on paper.

If the paper is easily damaged or the handwriting becomes blurry after coming into contact with water, oil, or friction, it indicates poor protective performance.

Light resistance performance:

High quality long-lasting three proof thermal paper should have good light resistance and be able to maintain clear color development for a long time in sunlight.

The light resistance of printed paper can be tested by placing it in the sun or applying it with a highlighter and then exposing it to sunlight.

4、 Fire baking test

Heat the back of the paper with a lighter and observe the reaction of the heat sensitive formula. If the color on the paper after heating is brown and the color is uneven, it may indicate that the heat sensitive formula is not very reasonable and the storage time of the paper is short. If the paper appears black green (with a hint of green) after heating, and the color blocks are uniform, and the color gradually fades from the center of the heating to the surroundings, it indicates that the quality of the paper is good.

5、 Other tests

Print head adaptability:

High quality long-lasting three proof thermal paper has good adaptability to the print head and will not cause wear or adhesion to the print head.

The adaptability of the paper to the print head can be verified by conducting actual printing tests on the printer.

Humidity test:

Place the thermal paper in a high humidity environment and observe the changes in the paper over a certain period of time. High quality thermal paper should be able to maintain good printing effect and color stability under high humidity.

6、 Environmental protection and sustainability

High quality long-lasting three proof thermal paper should be produced using environmentally friendly materials, free of heavy metals and other harmful substances, and have minimal environmental impact during production and use. At the same time, it is important to understand the disposal methods after disposal and select thermal paper products that are recyclable or biodegradable.

In summary, the quality of a long-lasting three proof thermal paper can be comprehensively evaluated through appearance inspection, color rendering effect, protective performance, fire baking test, and other testing methods. When making a purchase, it is recommended to choose the appropriate product based on actual needs and usage scenarios.