How to test the oil proof performance of the three heat-proof label paper?

It is an important quality evaluation step to test the oil-proof performance of the three heat-proof label paper. Here are some common detection methods:

First, direct oil stain test method

1.Prepare oil stain samples: select representative oil samples, such as cooking oil, oil, etc., to ensure the cleanliness and consistency of oil stain samples.

2.Apply oil stain: Use a dropper, cotton swab or other tool to evenly apply a certain amount of oil stain sample to the printed or unprinted area of the thermal label paper.

3.Observation record: Observe the penetration of the oil stain on the thermal paper, the diffusion speed and the impact on the writing or image. Record the appearance changes of the label paper after oil stains, such as whether there is blurring, discoloration, or peeling caused by oil stains.

Second, oil resistance test standard method

According to relevant industry standards or corporate specifications, such as the oil resistance test method specified in "QB/T 2694-2005 Thermal paper", more stringent testing. Such standard methods typically include:

1.Standard oil stain preparation: Prepare specific types of oil stain samples according to the methods specified in the standard.

2.Apply oil stain: under controlled environmental conditions, the standard oil stain sample is applied to the test area of the thermal label paper in a specified amount and manner.

3.Image stability test: Observe and record the changes in image stability on the label paper after oil staining, such as the change trend of image optical density value. This usually requires the use of professional testing instruments, such as dynamic color meters, reflected light density meters, etc., for accurate quantitative analysis.

Third, simulate the actual use of the environment test

In order to more truly evaluate the oil proof performance of the three heat sensitive label paper, it can be tested under conditions that simulate the actual use environment. For example:

1.High temperature and high humidity environment test: Place the label paper coated with oil stains in a high temperature and high humidity environment to observe the change of its oil resistance.

2.Long-term contact test: Let the label contact with the grease sample for a long time to observe the stability and reliability of its long-term oil resistance.

Fourth, precautions

1.Control variables: When testing, it is necessary to ensure the consistency of all test conditions, such as the type of oil stain sample, the amount applied, the test time, etc., in order to accurately compare the oil-proof performance of different labels.

2.Multiple tests: To improve the accuracy and reliability of the test results, you are advised to perform multiple tests and take an average value.

3.Professional instrument assistance: For test items requiring accurate quantitative analysis, it is recommended to use professional testing instruments for auxiliary testing.

Through the above methods, the oil-proof performance of the three heat-proof label paper can be comprehensively evaluated to ensure its stability and reliability in practical applications.