Fabric color fastness Testing for perspiration usually uses artificially prepared sweat for simulated testing. Here is a common testing method:

1. Prepare artificial sweat: Prepare a solution that simulates human sweat. Salt water (0.5-2% salt solution) can be used to simulate the composition of sweat. Make sure the saline solution has a similar concentration and pH to real sweat.

2. Prepare the test sample: Select a representative sample from the fabric for testing. The sample size should be sufficient to conduct multiple tests to obtain reliable results.

3. Soak the sample: Completely soak the fabric sample in artificial sweat to ensure that the sample is fully exposed to sweat.

4. Simulate usage conditions: Simulate the usage conditions of fabrics in sweat based on expected usage. For example, mechanical friction can be performed or the sample can be exposed to high temperatures and moisture.

5. Evaluate color transfer: After completing simulated use, observe whether there is any color transfer on the fabric. Score using a grayscale scale to evaluate the degree of change in color.

6. Analysis and evaluation results: Evaluate the color fastness of the fabric to perspiration based on the test results and scoring standards. The results are compared to pre-set standards to determine if the fabric meets requirements.

Please note that when testing the fabric's color fastness to perspiration, it can also be combined with other testing methods, such as the wet rub test or the wash test, to more fully evaluate the color fastness performance of the fabric.

In addition, if you want to obtain accurate and reliable test results, it is recommended to entrust the test to a professional laboratory or institution. They have the professional equipment and experience to conduct accurate testing and evaluation based on your needs.