Test and Analysis Experiment of Color Fastness of Camouflage Fabric

As a military camouflage fabric, it has special requirements due to the different environments and conditions used, especially the high requirements for color fastness to washing, abrasion and weather, and the dyes used are essentially military. special dye, and the color fastness is better than that of ordinary dye. Therefore, this article selects some common camouflage fabrics to test their color fastness of weather resistance, friction resistance and washing resistance, so as to lay a foundation for improving the color fastness of camouflage fabrics in the future.

1. Experiment
1. Experiment materials and content
12 kinds of commonly used camouflage fabrics were selected, and the specific specifications are shown in Table 1. In view of the specific use of camouflage fabrics, seven color fastness tests are selected here: resistance to artificial light, resistance to sunlight, resistance to artificial climate, resistance atno scrubbing, resistance to dry heat (ironing), resistance to perspiration and resistance to rubbing.
2. Experimental Instruments and Evaluation Standards
Experimental Instruments: YG611 Sunshine Climate Tester, Y571(B)C (Friction) Washing Color Fastness Tester, YG631 Perspiration Color Fastness Tester. YG (B) 605 ironing sublimation color fastness testing machine, Datacolor SF-300 computer color measurement and matching instrument.
Assessment standard: color fastness sample card (GB-251-64). Gray sample card (GB-250-84) for assessment discoloration. Color fastness fading swatch card, standard blue wool.

Test results and analysis
1. Artificial light color fastness (Xenon Arc Lamp)
The artificial light color fastness test method uses the ISOIO5-Bo2 standard, and 10 kinds of camouflage cloth with 16 colors are selected for the artificial light color fastness test. After 88 hours of continuous exposure calcthe standard change rate of grade 4 blue wool reached the degree shown in grade 2 of the \"Color Fastness Fading Sample Card\", see Table

2. After 2 hours, the instrument was used for evaluation, and the test results are shown in Table

3. Table 2 and Table 3 show that the color fastness of green samples in 2# and 5# fabrics is worse than that of other colours. This shows that the color fastness of fabrics dyed with multiple dyes decreases. This is consistent with Zhuang\'s research results. At the same time, the color fastness of different green samples is not the same. The speed of 8#, 11# and 12# samples is better. The speed of 4#, 9#, 2# and 5# is bad. It all has to do with fabric, dye and processing.
2. Color fastness to sunlight
The test method is ISO105-B03 Standard 7. Select 7 samples and 12 colorsrun to test. After continuous exposure for 14 days. The degree of change in the grade 4 blue wool standard reaches the degree shown in grade 2 of the \"Color Fastness Fading Sample Card\". After 2 hours, the instrument was used for evaluation. See table 4. Color fastness to sunlight The test results are better than the color fastness to artificial light, but there are still some differences in the color fastness of different green fabrics.

3. Artificial weather color fastness (xenon arc lamp)
The test method is the ISO105-BO4 standard. Eight kinds of green fabrics were selected for a color fastness test against weathering. The results are shown in Table 5. Table 5 shows that samples of 4# and 9# have poor color fastness, while samples of 8#, 11# and 12# have better color fastness and that the test results are basically consistent with the conclusions in 2.1.

4. Color fastness to scrubbing

The test method follows the ISO/DIS105 C07 standard. Seven samples were selected for testing. The results are shown in Table 6. See in table 6. The scrub resistance of selected samples is in principle better. The results of visual assessment and instrument assessment are essentially consistent. But there is a difference.

5. Color fastness to sublimation and ironing

The test method is ISO105-PO1 / P02 standard. The temperature of the upper and lower press blocks of the instrument is 180°C to ensure the sublimation resistance to be tested; when testing the iron resistance. The temperature of the upper block is 180°C. The lower block is0°C; select 2#, 3#, 5#, 6# and 8# samples to test (visual assessment). The test results are shown in Table 7. The data in Table 7 show that. The sublimation and ironing color fastness of selected samples is basically better.

6. The test method is ISO105-X12—2001 standard.

This is shown in Table 8. Dry and wet rub resistance of 1#~9# samples. Discoloration and stains are basically better. Among them, the rub resistance is slightly better than the wet rub resistance.

7. Color fastness to perspiration

The test method is ISO105-E04 standude. Five samples were selected for testing. The results are shown in table 9. The values ​​in table 9 show this. The selected samples have good color fastness to perspiration, but there are some differences between visual evaluation and instrumental evaluation.

3. Conclusion

The test analysis of 7 items of color fastness of 12 types of camouflage fabrics shows that. The color fastness can meet the actual conditions of use. As a military camouflage fabric, due to the special use environment and conditions, the requirements for color fastness, such as washing resistance, friction resistance and weather resistance, are relatively strict, so the use of special military dyes can basically meet the requirements. The analysis resultThe results of this test can be a sure reference for improving the color fastness of camouflage fabrics in the future. 

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