The washing color fastness tester is primarily used to test the color durability of textiles during the washing process. This instrument simulates the physical forces of textile washing, such as abrasion, pulling, and friction, to assess color fastness.
Operating Procedure
1. Sample Preparation:
Select the textile sample to be tested. Samples are usually cut to specific specifications.
Ensure that the sample is clean and free of contamination to avoid affecting the test results.
2. Placement in the Tester:
Evenly place the sample in the washing tub of the washing color fastness tester. Multiple samples are usually placed to ensure representativeness of the test.
Depending on the instrument design, the sample may need to be mixed with a certain amount of detergent and water.
3. Setting the Test Conditions:
Set the water temperature: Select a water temperature that matches actual washing conditions.
Set the wash time: Typically, set it to 30 minutes, 1 hour, etc., according to standard test methods.
Set the speed or shaking mode: Set the appropriate speed or shaking mode according to the instrument specifications to simulate the friction and impact of washing.
4. Start the Test:
Start the instrument to begin the test. The instrument will simulate the washing process for a specified period of time, automatically performing agitation, rotation, and other actions.
5. Remove the Sample and Cool:
After the test, remove the sample and place it in a suitable location to cool. Note that the sample may still retain some moisture; allow it to dry naturally.
6. Measure Color Change:
Use an instrument such as a colorimeter to measure the color change of the sample after washing. The degree of color change is usually expressed as a color difference value.
Compare the color difference value with the standard evaluation criteria to determine the washfastness grade.
7. Record and Report:
Record the test results and evaluate the colorfastness of the textile according to the standard.
Complete the test report, which typically includes the sample number, test conditions, colorfastness grade, and any possible deviations.
II. Precautions
Sample Size and Uniformity: Ensure that the test samples are of uniform size to avoid biased results due to sample inhomogeneity.
Detergent Selection: Use a standard detergent for testing to ensure experimental reproducibility.
Instrument Maintenance: Regularly inspect the instrument to ensure proper functioning of the temperature control and stirring systems.
Standard Compliance: Strictly adhere to relevant standards during testing to ensure scientific and fair test results.
