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Fastness to Light Tester TF420

4.57 (7 reviews)

The Fastness to Light Tester, or Light Fastness Tester, Xenon Tester is used for light fastness testing and xenon arc testing. It also does light aging tests for textiles, printing, dyeing, and clothing. It tests car interior parts and geotextiles. It also tests leather, artificial board, wood flooring, plastic, and other colored materials. It controls light, temperature, humidity, and rain. We’ve got expert guidance to help you with the xenon test chamber. Our company is very experienced in producing Air-cooled Light Fastness tester.

The Xenon Tester TF420 complies with ISO 105-B02/B04, AATCC 16-2003, GB/T 8427/8430, and more. To learn the prices of light fastness testers, contact us. We are a professional supplier of textile instruments. We’re devoted to providing high-quality Light Fastness Testers at reasonable prices.



Features of Fastness to Light Tester TF420

The Fastness to Light Tester 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 Fastness to Light 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 XenonTester 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 on Xenon Testing: 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 Xenon Arc Testing 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 TF420 can run for a long time: to meet the high capacity, long-duration test applications, and customer-specified needs, the Weatherometer can run for 1000 hours at a time.

The Xenon Test Chamber TF420 has a competitive price: TESTEX Weatherometer is available at low purchase prices, with low lamp prices and operating costs, and stable operation. Now even the smallest labs can afford Light Fastness Tester.

Specifications of Fastness to Light 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 Fastness to Light Tester TF420

Textile light fastness is crucial. The Xenon Tester TF420 is a key tool for textiles. You can use it to test the color and performance changes of many materials. These include textiles, leather, and fake leather. They also include garments, auto parts, plastics, dyes, paints, and other colored materials. Adjust the temperature, humidity, and rain in the Weatherometer. Use a xenon lamp and light filter to mimic daylight. These tests check the material’s light fastness, sunlight weather fastness, and light aging resistance.

TESTEX Fastness to Light Tester TF420 has multi-point change functions. They mainly control light intensity online. They also detect and adjust light energy automatically. They use closed-loop control to manage temperature and humidity. They also control the blackboard’s temperature circuit. You can call this Weatherometer a Xenon Test Chamber or a Fadeo meter. This is based on these applications. Besides, it can shorten the testing time. It uses xenon arc irradiation in a chamber. So, we can also call it a Xenon Tester.

Xenon Test Chamber TF420 applies to Light Fastness Test iso 105 b02. It also applies to AATCC16.3 Color Fastness to Light. Five xenon testing methods for ISO 105 B02 can be acquired in this post. Also, you can easily get your sample’s lightfastness rating from this Xenon Tester.

Test Principle of the Fastness to Light Test, how is colour fastness to light tested?

TESTEX Xenon Arc Test Chamber uses a full-spectrum xenon arc lamp light source. The test chamber has a special filter glass. It uses it to produce the specific sunlight spectrum that hits the specimen. Then, a mix of temperature, humidity, rain, and condensation simulates the natural environment. They act on the specimen. After the test, we evaluate the test material. We mainly observe its fading, discoloration, brittleness, and cracking. This tells us about its light fastness and aging. We also look for color peeling and other issues. The grade of the product usually fades and ages. It is evaluated with a gray sample card and blue wool standard (blue standard). To learn more about light fastness test standards, contact us. We are glad to share them with you.

Know more about Fastness to Light Test

Lightfastness, also named “sunlight fastness”. Lightfastness is the ability of a product to keep its color. It must do so after being in the sun. The lightfastness scale ranges from poor to good, divided into 1 ~ 8 levels. Weather fastness is the ability to resist aging from sunlight, heat, cold, wind, and rain. Products like plastic, rubber, coatings, and fibers usually need to do those tests.

When the xenon testing is running, adjust the chamber’s temperature, humidity, and rain. Also, adjust other test conditions. The xenon lamp simulates sunlight. It tests the material’s ability to resist fading and aging. For more information about lightfastness, welcome to visit our website’s blog.

Welcome to TESTEX. We are a professional supplier of textile testing instruments. The Fastness to Light Tester TF420 is on sale. Contact us to get a price quote for a light-fastness tester.

7 reviews for Fastness to Light 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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