How to test the water resistance of wax based carbon tape?

The main purpose of testing the water resistance of the wax-based carbon strip is to evaluate the stability of the printed carbon strip in water or wet environments to ensure that it will not fade or blur easily due to contact with liquid during use. The following are the specific steps and methods for testing the water resistance of wax based carbon strips:

First, the preparation stage

1. Select sample:

Select a representative sample of the wax based carbon strip to ensure that the sample is uncontaminated and meets the test requirements.

2. Print proof:

Use a dedicated printer to print a clear, full bar code, text or pattern on standard test paper (such as coated paper) as a test sample.

3. Preparing the test environment:

Ensure that the test environment is stable and avoid external factors (such as temperature and humidity changes) affecting the test results.

Second, test steps

1. Immersion test:

The printed test sample is immersed in pure water according to certain requirements (such as soaking time, water temperature, etc.).

Common soaking conditions may include soaking in pure water at (30±5)℃ for 2 hours, the specific conditions can be adjusted according to the test standards or actual needs.

2. Drying treatment:

After soaking, the proof is removed from the water and placed in an oven at a specified temperature (e.g. (40±2)℃) for a certain period of time (e.g. 30 minutes) to remove surface moisture.

3. Evaluation effect:

Use visual observation or a professional instrument (such as a spectrodensitometer) to measure the change in color density of the printed content on the sample before and after immersion.

Calculate the color density attenuation rate, which should not be greater than the specified standard value (such as 5%) to evaluate the water resistance.

Third, record and analysis

1. Detailed records:

Record the parameters of the test process, including soaking time, water temperature, drying conditions and color density measurement results.

2. Data analysis:

Compare the color density values before and after immersion, calculate the decay rate, and evaluate the water resistance of the wax based carbon strip according to the test standards or customer needs.

3. Summary report:

Prepare test report, summarize test results and make improvement suggestions (if necessary).

Fourth, precautions

1. Compliance standards:

During the testing process, the relevant industry standards or customer requirements should be strictly followed to ensure the accuracy and reliability of the test results.

2. Control variables:

During the testing process, other variables that may affect the test results should be controlled as much as possible, such as water temperature, soaking time, dry conditions, etc.

3. Safe operation:

When performing operations such as soaking and drying, pay attention to safety to avoid accidents such as scalding and electric shock.

Through the above steps and methods, the water resistance of the wax-based carbon strip can be comprehensively evaluated to ensure its stability and reliability in practical applications.