A fabric’s degree of resistance to the fading effect of light. Colorfastness to light is a measure of how permanent a color is on fabric after exposure to light. The multifiber fabric is then compared to the Grey Scale for Staining and the test specimen is compared to the Grey Scale for Color Change. Physical Properties. You put the tested fabric with the non-tested fabric, or the non-dyed swatch into the machine and set the appropriate light source. After soaking, the fabric is then placed between glass or plastic plates and dried under specified time, pressure and temperature conditions. Every fabric manufacturing brand has its own preference for the tests they choose to use in determining color fastness. Find out the key differences between these fabric dyeing methods. A textile item must withstand repeated washing throughout its lifecycle without losing its color properties or staining other articles its washed with. In the case of AATCC 16 Option 3, a strip of fabric is placed in a fadometer and exposed to accelerated fading units (AFU) for 40 hours.Â. Any number of activities associated with regular use can reveal these issues, including: Unlike other types of fabric testing, such as flammability, there are no mandatory legal requirements for color fastness testing. This is why itâs so important for manufacturers to ensure color fastness at the production stage. The test specimen and multifiber fabric are immersed together in water under specific conditions of temperature and time. How does it work? The lab compares the color of the test specimen with the Grey Scale for Color Change, with a desired grade 4 rating. Consumers don’t like their textiles to change colors or bleed during washing, under the sun or anywhere else. The direction is particularly important for striped or pattern fabrics for which results can vary. Contact us today to discuss your fabric requirements. Knit Fabrics. EYSAN FABRICS | Functional Knitted Fabric, Ultimate Guide to Color Fastness of Fabrics, If youâre researching textiles (or just looking to avoid laundry disasters) read this. Coated Fabrics. Sourcing material for outdoor or sports clothing? However, a lot depends on the original color of the fabric. If you have any level of color blindness or color deficiency, you might not be able to accurately judge what you are seeing. But the standards vary significantly in their assessment methods. The dyeing process and whether fabrics have undergone soaping after dyeing. Luggage zipper reciprocating fatigue tester for standard. All textile colorants are susceptible to some fading in sunlight, as colorants by nature absorb certain wavelengths. The “C”, “D” and “E” methods test fabrics at higher temperatures with different bleaches and softeners. A fabric with good quality color fastness would achieve a color change rating of 4 and a color staining rating of 3 to 5. We hope you found it useful. The Blue Wool Scale ranges from 1 (very low color fastness to light) to 8 (very high color fastness to light). The American Association of Textile Chemists and Colorists (AATCC) and the International Organization for Standardization (ISO) color fastness standards are the most commonly used in the U.S. and EU, respectively. Some common light sources for color checking include: Under this light, you can then check your fabrics for color differences using the James Standard Heal Stained Grey Card. Â© 2020 Eysan Fabrics Co,. The “S” in the ISO 105 C06 test number refers to a single commercial or domestic laundering. Existing customers: Color fastness issues will often prompt consumers to reject the product and return it or submit a claim. “Colorfastness to light refers to a fabric’s ability to resist fading when exposed to light.” The test used to measure colorfastness to light is AATCC 16 option 1 or 3. This multifiber fabric has swatches of different kinds of fibers, such as nylon, cotton, acetate, polyester, wool and acrylic fabrics. The fabric (along with a non-dyed fabric strip) is washed at various water temperatures in a machine specifically designed to test colorfastness to washing. A fabric with good quality color fastness would achieve a color change rating of 4 and a color staining rating of 3 to 5. However, there are limitations. Both natural and synthetic fabrics are subject to discoloration under UV rays (sunlight) and fluorescent light. Or get in touch today to find out about EYSANâs extensive range of knitted fabrics. The fading mechanism is different, such as the fading of azo dyes on cellulose fibers, mainly due to the oxidation of dyes by air under the illumination of light, and its fading on protein fibers is often the result of reduction. It is expressed as the numerical rating for light fastness. Receive our latest news and make sure you don't miss anything! The tested fabric is rubbed against both wet and dry, non-dyed fabric for a specified time on a specially designed machine – a crockmeter. For instance, polyester is usually more colorfast than nylon. Color fastness to light testing might be particularly important to importers of clothing worn predominately outdoors. +852 34613193 (English and Cantonese) But color fastness testing is essential to ensuring customer satisfaction with fabric products. Ltd.All Rights Reserved. There are varios types of colorfastness test are used to measure garments quality. Box 101981 Fort Worth, TX 76185. ISO 105 X12 requires the cloth be wetter than that following the AATCC 8 standard. Hire a professional laboratory to test your fabrics and ensure optimum color fastness levels before your next shipment. The test fabric is then assessed for the level of fade. Color fastness testing in a third-party laboratory can help you ensure your fabric’s colors stay fresh and vibrant after many uses. The two main standards for detergent washing are ISO 105 C06 and AATCC 61. https://textilelearner.blogspot.com/2012/11/different-color-fastness-tests.html Examples include SGS, Bureau Veritas(BV) and Intertek. That is, level 2 sun 57 h, level 3 sun 112 h, level 4 sun 166 h, level 5 sun 220 h, level 6 sun 275 h, 7 level sun 329 h. Light fastness test is one of the very important test required for consumers. This machine replicates different light sources in a consistent way, making your visual assessment of color much more accurate.