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- It refers to the resistance of textile colors to effects such as color change or transfer during processing and use. The fastness grade, i.e., the degree of color fastness of fabric, is evaluated according to the discoloration of a sample and the staining of the undyed lining fabric.
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Definition, Meaning, and Types. Color Fastness is an important consideration in the production of textiles, clothing, and fabrics, as well as in the printing and dyeing industries. Testing for colorfastness is typically performed using standardized methods to ensure consistent and reliable results.
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At a commercial level, light fastness testing gives manufacturers confidence in their products. It helps them extend ranges, enter new markets, and develop innovative materials ahead of their competitors. It also enables them to meet national, international and retailers' standards.
Light Fastness Testing is a good way for brands and product designers to experiment with a range of new products - and know they've got them right before launching them.
For many industries, light fastness testing is a fundamental part of research and development and quality control. Exposing your samples to natural sunlight in the location where they're going to be used is impractical, as for most materials this can take months or even years - and how many R&D departments can afford to wait that long? Instead, mos...
This is the only way to reliably reproduce the sunlight spectrum, and it involves using different optical filters to replicate specific light conditions. For instance; James Heal's TruFade light fastness tester simulates natural light using continuous wave technology - meaning the lamp stays on during the test, to maximise the samples' exposure to ...
If the material is going to be used outdoors, the weather - particularly rain - is another important consideration. The testing instruments need a water spray that simulates rainfall, and that can be regulated to reflect the climate of different parts of the world.
Materials that perform poorly in light fastness testing indicate that a product is likely to fade when exposed to light. This may result in product returns or complaints from customers. Therefore, if manufacturers can undertake light fastness testing during R&D, this can provide a warning sign during development.
How do you know when the material has had enough exposure to light? For many years, 'Blue Wool light fastness reference standards' have been used to indicate the end of test exposure and for grading purposes. Now it's becoming common for testers to measure and control the level of irradiance - the test being complete when a certain level of irradia...
Until recently, most manufacturers wanting to run light fastness tests on their materials had to send everything out to specialist laboratories. It has been a complex and expensive process - something definitely best left to the experts. Now, technological advances have led to the development of modern, affordable testing equipment, which is much e...
With many years' experience in producing testers for all kinds of colour fastness, we saw the emerging need for more accessible, user-friendly light fastness technology, so we developed TruFade, our revolutionary light fastness tester. TruFade, can be used to test the light fastness of textiles and other materials. With its excellent reputation for...
The ability to accurately control temperature and humidity is important. Testing equipment needs a way of anticipating the effects they can have on each other. TruFade, overcomes these uncertainties, to achieve the desired settings without one factor throwing the other out of balance.
Dec 16, 2021 · To test for color fastness, find a hidden seam of the garment or an hidden spot. Apply the cleaner to the garment and then dab the area with a clean cotton cloth. If the color removes itself from the garment onto the cloth, you should not use the cleaning product on the clothing.
There are a few main methods used to test color fastness: Crocking tests measure how much color rubs off through abrasion and handling. Higher ratings mean less dye transfer to other fabrics. Wash fastness tests simulate multiple machine wash cycles to check for color bleeding and fading.
Jan 11, 2013 · The colour fastness to washing is tested by assessing the colour loss and staining on adjacent fabric resulting from desorption and or abrasion action in one single test that is closely approximate to one commercial or domestic laundry. You may also like: How to Determine Color Fastness to Wash.
AATCC TM61-2013e(2020) is an accelerated washing test method for colorfastness to laundering of textiles after frequent washing, whereby the fabric is subjected to the washing and rubbing action of five typical hand or home laundering loads, close to a single 45-minute test.
Nov 24, 2022 · Definition of colour fastness. The so-called color fastness refers to the degree of fading of dyed fabric under the action of external factors (extrusion, friction, washing, rain, exposure, light, seawater impregnation, saliva impregnation, water stains, sweat stains, etc.) during use or processing. It is an important index of fabric.
