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Light & Weather Fastness Tester TF420

4.57 (7 reviews)

Light & Weather Fastness TesterTF420, or Xenon Arc WeatherometerXenon Test Chamber, used for light fastness, weather fastness, and light aging test for textiles, printing and dyeing, clothing, automotive interior parts, geotextiles, leather, artificial board, wood flooring, plastic, and other colored materials of By controlling the light irradiance, temperature, humidity, rain, etc. We can provide professional light fastness tester guidance to help you solve your problems with xenon tester. Our company is very experienced in producing Air-cooled Linght Fastness tester.

TESTEX Light & Weather Fastness Tester TF420 complies with ISO105-B02/B04, AATCC 16-2003, GB/T 8427/8430, etc. If you want to know more about xenon weather meter prices, please contact us. As a professional supplier of textile instruments, we are devoted to providing Light &Weather Fastness Testers with high quality and reasonable prices.



Features of Light&Weather Fastness Tester TF420

The Xenon Test Chamber TF420 achieves a digital setting of light intensity: real-time monitoring, closed-loop control, and automatic adjustment so that it can meet different standards. (Standard 420nm; 340nm, 300~400nm, 300~800nm available on request).

The Light&Weather Fastness Tester TF420 simulates real sunlight and climate state: using a 2500W long-arc xenon lamp, a real simulation of daylight spectrum, and a variety of operating modes (rain, alternating light, dark, public rotation, self-rotation), to create a real climate state.

The Xenon Test Chamber TF420 can reach accurate and stable tests on temperature and humidity: industrial temperature control (cooling) system, multi-stage ultrasonic humidification intelligent control system, and rapid adjustment of the test chamber temperature and humidity to ensure accurate and stable test temperature and humidity.

More accurate reflection of sample test results: black panel thermometer (BPT), standard black panel thermometer (BST), radiometer, and sample at the same station (equidistant) detection, the measured data using wireless radio frequency technology synchronous transmission.

Efficient mode reduces operating costs: all specimen clamps achieve separate timing, can be carried out at the same time with different samples of the experiment, are convenient for test monitoring, and practical, and greatly reduce costs.

Color touch screen display, a variety of expressions: digital, graphs, etc.; can display light irradiance, temperature, and humidity curve in real-time.

The Xenon Test Chamber TF420 can run for a long time: to meet the high capacity, long-duration test applications, and customer-specified needs, the xenon arc light fastness tester can run for 1000 hours at a time.

TESTEX Xenon Arc Weatherometer has a competitive price: TESTEX Weather Ometer is available at low purchase prices, with low lamp prices and operating costs, and stable operation. Now even the smallest labs can afford Xenon Arc Weatherometer.

Specifications of Light&Weather Fastness Tester TF420

Working modesTo simulate and reinforce the impact of the nature of the measured object, providing light and dark, temperature and humidity, raining and other quantitative indicators.
Irradiance      0.80 ~ 1.50W/m2 @ 420nm (340nm, 300~400nm, 300~800nm is offered on request), Digital set, automatic closed-loop compensation
Irradiance accuracy      ± 0.02W/m2 @ 420nm
Light source     2500W air-cooled long-arc xenon lamp
Sample holder
• ISO / GB
16 Pcs, can hold samples 135 x 45mm
8 Pcs, can hold samples 140 x 75mm
Temperature range      25 ~ 50 ℃, Resolution 0.1 ℃
Humidity range Bright cycle 10 ~ 70% RH,
Dark cycle 30 ~ 95%, R. H.
resolution 0.1%
Test time control     ≤ 10000h
Rotation speed of sample holder 5 rpm
BPT Range (40 ~ 80) +/- 2℃
BST Range (40 ~ 85) +/- 1℃


250 kg


220 V50 Hz6.5 kW


Length: 1050 mmWidth: 660 mmHeight: 1680 mm


ISO 105-B02ISO 105-B04GB/T 8427GB/T 15102-2006

Application of Light & Weather Fastness Tester TF420

Light fastness in textiles is very important, so Light& Weather Fastness Tester TF420 is a practical instrument for the textile industry. Applicable to test the color and performance changes of various textiles, leather, artificial leather, garment, automobile interior parts, plastics, dyes, coatings, paints, and other colored materials. By adjusting the temperature, humidity, rain, and other test conditions in the test chamber, as well as using a xenon lamp and light filtering system to reliably simulate the full spectrum of daylight, test the material light fastness, sunlight weather-fastness, and light aging resistance.

TESTEX Light & Weather Fastness Testing Machine TF420 has multi-point adjustment functions. They are mainly online control of the light intensity, automatic detection, and compensation of light energy, closed-loop control of temperature and humidity, and the control of blackboard temperature circuit. Based on these applications, you can call this weather meter a light fastness tester or fade o meter. In addition, it can shorten the testing time by using xenon arc irradiation in a chamber, thus we can also call it a xenon arc weather o meter chamber.

Light & Weather Fastness Tester TF420 is applicable both for Light Fastness Test iso 105 b02 or  AATCC16.3 Color Fastness to Light. Five light fastness test methods for ISO 105 B02 can be acquired in this post. What’s more, the lightfastness rating of your sample testing can be easily acquired from this Xenon Tester.

For the testing of textiles’ color fastness to light and weather, you can also choose a Water-cooled Light & Weather Fastness Tester as an alternative.

Test Principle of the Light & Weather Fastness Test, How is color fastness tested?

TESTEX Xenon Arc Test Chamber uses a full-spectrum xenon arc lamp light source. Through a special filter glass, in the test chamber to produce a specific glass window sunlight spectrum, exposure to the specimen. Then with a combination of temperature, humidity, rain, condensation, and other natural environment simulation, comprehensive action on the specimen. When the test is completed, the light fastness and aging of the test material are evaluated mainly by observing the fading, discoloration, brittleness, cracking, cracking, color peeling, and other phenomena of the material. The fading and aging grade of the product is usually evaluated with a gray sample card and blue wool standard (blue standard). For more about light fastness test standards, please contact us directly and we are glad to share them with you.

Know More about Light & Weather Fastness Test

Light fastness, also named “sunlight fastness”. Lightfastness meaning is the ability of the product to maintain its original color after being exposed to sunlight. From poor to good, the light-fastness scale is divided into 1 ~ 8 levels. Weather fastness or aging resistance is the durability or product life by exposure to sunlight, heat, and cold, wind and rain, etc. Goods such as plastic, rubber, architectural coatings, and fiber materials usually need to do those tests. When the light &weather fastness test is running, adjust the temperature of the test chamber, humidity, rain, and other test conditions, with the xenon lamp simulating the effect of sunlight, to test the material’s light fastness and aging resistance. For more information about light fastness, welcome to visit our website’s blog.

Welcome to TESTEX – a professional textile testing instrument supplier – Light & Weather Fastness Tester TF420 is on sale, contact us to get a light fastness price quote.

7 reviews for Light & Weather Fastness Tester TF420

  1. Jacob Martin

    To conduct the aging testing of the fabric, this chamber is a must
  2. Chris Norman

    It took me a period of time to make the decision to buy this Xenon Test Chamber, but I got what I want, a well-designed machine with affordable price.
  3. Nicole Flynn

  4. Leila Hosea

    Fast delivry and it works fine.
  5. Truman Rhys

    Professional manufacturer,Awesome machine!
  6. Michell Moulton

    Received the machine, all are in good package. Thanks manufacturer.
  7. Ron Harrod

    • testextextile

      Thank you for your support, hope you can satisfied. Look forward to your next visit.
Leave a customer review
Test principle

In the test, put the textile specimen and the mutually agreed reference standard specimen (blue standard wool) under exposure to sunlight according to the specified requirement. Then compare the degree of their discoloration. At the same time, we can make a determination of the grade of light fastness of the textile specimen, which is based on the blue wool light fastness standard sample exposed to sunlight. Besides, all the test standards of sunlight fastness apply a relative comparison method. However, the exposure equipment does not directly show the test results. The performance of the equipment mainly depends on the control of the parameters which affect the test environment, including the spectrum, light intensity, temperature, relative humidity, etc.

Test procedures

Humidity regulation
1 Check whether the equipment is in good operating condition
2 Put a humidity control specimen on a hard card together with a blue wool standard and place it in the middle of the specimen holder as far as possible.
3 Place the loaded specimen holder on the specimen holder of the equipment
4 After turning on the xenon lamp, keep the equipment running continuously until the test is completed.
5 put the partially covered humidity control specimens and blue wool standard at the same time under exposure to the sunlight.
Methods of exposure to sunlight
Under predetermined conditions, the specimen and the blue wool standard should be exposed to sunlight at the same time.
Method 1

This method is considered to be the most accurate and should be used when ratings are in dispute. Its basic feature is to control the exposure period by checking the specimen
1 Place the specimen, the blue wool standard, and the cover in accordance with certain requirements, and expose them to the xenon lamp, lifting the cover from time to time to check the light effect of the specimen.
2  Expose the specimen to the sunlight in accordance with the required degree.
Method 2
1 This method is suitable for testing a large number of specimens at the same time. The basic feature is that the exposure period is controlled by checking the blue wool standard, and only one set of the blue wool standard is used to test a batch of specimens with different light fastness, thus saving the material used for the blue wool standard.
2 The specimens and blue wool standards are covered and then exposed until the relevant requirements are met.


1 If the power is turned on and there is no display, it means that the power is not on or the power indicator is damaged. If the power indicator is damaged, replace it. If there is no power output on the power output terminal, please check the power cord or energized socket.
2 If the power is turned on and there is an indication on the power indicator, but the machine does not work when pressing the start button, please check whether the relay has dropped or disconnected. If so, please promptly connected. But if there is no drop or disconnection, indicating that the relay has been damaged, then replace it in time.

Dos & Don’ts when operating the xenon lamp weatherometer?

1 Do not open the right box cover during the operation of the equipment. The right box body of the weather ometer is mainly the electrical function component. There is a high dangerous voltage above 10kV when the xenon arc lamp flip-flop works. Removing the lid of the box may cause the personnel to touch the electrical component part, resulting in an electric shock.
2. Do not try to manually press the protection switch of the test storehouse for lighting operation when the test storehouse glass door is opened. It is forbidden to open the test storehouse glass door when the xenon arc lamp is ignited.

3. Do not directly view the xenon arc lamp light source of the fadeometer in the unprotected state to avoid damage to the eye.

4. Operators should keep their attention in the process of operation in order to prevent the occurrence of dangerous failures caused by negligence.
5. The xenon arc weatherometer must be disconnected from the power supply before the maintenance of the equipment. The maintenance of the light fastness testing machine, especially for the electrical part, should be operated by special technicians.
How to use the fade o meter? Through this article, I think you might have gotten some information. If you want to know more about xenon weather meter prices, please contact us. As a professional supplier of textile instruments, we are committed to continually improving the user experience, TESTEX Textile Testing Equipment is a reliable choice for testing textile quality.

How to pass the color fastness to light?

1. Selecting dyes according to fiber properties and textile uses

For cellulose fiber textiles, dyes with better antioxidant properties should be selected. For protein fiber textiles, dyes with better anti-reduction properties or containing weak oxidizing additives should be chosen. Other fibers should be selected based on their impact on fading. In order to enhance the light and oxidation stability of azo compounds in dye molecules, some strong electron-withdrawing groups are usually introduced into the adjacent position of the azo group during the dye synthesis process, thus reducing the electronic cloud density of the azo atomic. In addition, hydroxyl groups can also be introduced into the two adjacent positions of the azo group, and their coordination ability can be used to chelate with heavy metals, thereby lowering the electronic cloud density of the azo hydrogen atoms and shielding the azo group, ultimately improving the light fastness of the dye.

2. Dye selection based on color depth

A large number of experiments have shown that the light fastness of reactive dyes on cellulose fibers is proportional to the depth of the color, that is, the darker the color, the better the light fastness. This is because the higher the concentration of the dye on the fiber, the greater the aggregation of the dye molecules, and the smaller the surface area of the dye exposed to air, moisture, and light, and the lower the chance of oxidative degradation of the dye. Conversely, for lighter shades, the dye is mostly in a highly dispersed state on the fiber, and the chance of being exposed to light is higher, resulting in significantly reduced light fastness. Therefore, for lighter shades, dyes with higher light fastness should be selected. In addition, the addition of many finishing agents such as softeners and wrinkle-resistant agents to fabrics can also reduce the light fastness of the product. Therefore, dyes that are insensitive to these finishing agents should be selected.

3. Selecting dyes with good light stability and compatibility for color mixing

Different dyes have different fading properties, and even the photo color fading mechanism is different. Sometimes, the existence of one dye can sensitize the fading of another dye. When mixing colors, dyes that do not sensitize each other and can even improve light stability should be selected, which is particularly important for darker shades such as black. If one of the primary colors fades too quickly, it will quickly cause discoloration of the dyed fiber or fabric, and the remaining dye residue after fading will also affect the light stability of the other two dyes that have not faded. Reasonable control of the dyeing process, ensuring a full combination of dyes and fibers, and minimizing the presence of hydrolyzed and unreacted dyes on the fibers are important ways to achieve higher light fastness.

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