How to test the three proof performance of long-lasting three proof thermal paper?

The three proof performance (waterproof, oil proof, scratch proof) of long-lasting three proof thermal paper can be tested through a series of standardized testing methods. The following is a detailed analysis of these testing methods:

1、 Waterproof performance test

Test objective: To evaluate the ability of thermal paper to maintain clarity and integrity after contact with moisture.

Testing method:

Prepare a certain amount of distilled water or tap water.

Use an eyedropper or spray to evenly apply water droplets or mist to the printed surface of the thermal paper.

Observe and record the diffusion, permeation rate, and surface changes of water droplets on paper.

Gently press the surface of the paper with absorbent paper to remove excess moisture, and check if the printed information is blurry or detached.

Score or grade the waterproof performance based on observation results.

2、 Oil resistance performance test

Test objective: To evaluate the ability of thermal paper to maintain clarity and integrity after contact with grease.

Testing method:

Prepare a certain amount of edible oil or other common fats.

Use a cotton swab or brush to evenly apply grease onto the printing surface of the thermal paper.

Observe and record the penetration, diffusion speed, and surface changes of grease on paper.

Gently press the surface of the paper with oil absorbing paper to remove excess grease, and check if the printed information is blurry or detached.

Score or grade the oil resistance performance based on observation results.

3、 Scratch resistance performance test

Test objective: To evaluate the ability of thermal paper to maintain clarity and integrity after mechanical scratching.

Testing method:

Use standard friction testing instruments or manually scratch the printing surface of thermal paper with moderately hard objects such as pencils, nails, etc.

Observe and record the changes on the surface of the paper after scratching, the integrity of the printed information, and whether there are blurs, peeling, or scratches.

Score or grade the scratch resistance performance based on observation results.

4、 Comprehensive evaluation and precautions

Comprehensive evaluation: After conducting the above tests, a comprehensive evaluation of the three proof performance of the long-lasting three proof thermal paper can be carried out. The evaluation results can include performance level, scope of application, and improvement suggestions.

matters needing attention:

During the testing process, it should be ensured that the testing methods and conditions used comply with the requirements of relevant standards or specifications.

The test results may be affected by various factors, such as paper quality, coating formula, testing environment, etc. Therefore, when making comparisons or evaluations, these factors should be fully considered.

To ensure the accuracy and reliability of the test results, it is recommended to conduct multiple repeated tests and take the average as the final result.

In summary, through standardized waterproof, oil resistant, and scratch resistant performance testing methods, the three proof performance of long-lasting thermal paper can be comprehensively evaluated. These test results will provide important reference for the production and application of thermal paper.