How to verify the waterproof performance of PET matte silver label paper?

To verify the waterproof performance of PET matte silver label paper, the following methods can be used:

1、 Direct immersion test

Prepare samples: Take a certain amount of PET matte silver label paper as the test sample.

Immersion treatment: completely immerse the sample in clean water and maintain it for a period of time (such as 5 minutes or determined according to actual needs).

Observing changes: After taking out the sample, observe whether there is any damage, deformation, wrinkling, or color fading on the surface of the label paper. At the same time, check whether the adhesion of the label paper is affected and whether it can maintain a firm adhesion.

Record results: Based on the observation results, record the waterproof performance of the label paper.

2、 Spray test

Prepare equipment: Use a spray bottle or similar water spray device.

Spray treatment: Spray water on PET matte silver label paper samples to simulate rainwater or splashing.

Observation reaction: Observe the changes on the surface of the label paper after spraying water, especially whether there are signs of water droplets penetrating or diffusing.

Evaluate Waterproof Performance: Evaluate the waterproof performance of the label paper based on the appearance of water droplets on the surface.

3、 Simulated wet environment test

Create an environment: Use a humidity chamber or similar device to create a high humidity testing environment.

Place the sample: Place the PET matte silver label paper sample in a humidity chamber and hold it for a period of time (such as 24 hours).

Check for changes: After removing the sample, inspect the label paper for any deformation, fading, or reduced adhesion caused by moisture.

4、 Professional testing institutions conduct testing

Choose a testing institution with relevant qualifications and experience.

Submit samples: According to the requirements of the testing agency, submit a certain number of PET matte silver label paper samples.

Conduct testing: The testing agency will use professional testing methods and equipment to test the waterproof performance of the samples.

Obtain report: After the test is completed, the testing agency will provide a detailed test report, including the evaluation results of waterproof performance.

5、 Practical application test

Paste location: Paste PET matte silver label paper on items or surfaces that may come into contact with water, such as water bottles, bathroom items, etc.

Observation performance: Over a period of time (such as several days or weeks), observe the waterproof performance of label paper in practical applications.

Record results: Based on the observation results, record the waterproof performance and durability of the label paper in practical applications.

Through the above methods, the waterproof performance of PET matte silver label paper can be comprehensively and accurately verified, ensuring that it can meet waterproof requirements in practical applications.