White and light-colored shoe materials have a short path to visible failure: a few days of sun exposure or a hot shipping container can turn an acceptable product into a discolored return. The UV Light Discoloration Tester simulates that exposure in a controlled chamber, using a 300W OSRAM UV lamp and heated air circulation to accelerate yellowing. This UV Light Discoloration Tester is built for footwear material suppliers, leather and PU manufacturers, and quality control laboratories that need ASTM-D1148 and HG/T 3689 yellowing data without waiting for outdoor weathering.

Technical Specifications

The UV Light Discoloration Tester is supplied as a single model, GT-KD02, with the UV lamp system, hot-air circulation, turntable, and timer configured as a complete benchtop test station.

GT-KD02 Core Configuration

• Model/Part Number: GT-KD02

• Applicable Standards: ASTM-D1148, HG/T 3689

• Light Source: OSRAM fluorescent UV lamp

• Lamp Power: 300W

• Lamp Irradiance: (25 ± 0.4) W/m²

• Lamp Service Life: 1000 hours

• Temperature Range: Room temperature to 120°C

• Temperature Resolution: 0.1°C

• Heating Method: Hot-air circulation

• Timer: LED display, 0 to 999 hours

• Turntable Diameter: 35 cm

• Turntable Speed: 3 rpm

• Interior Chamber Dimensions: 50 × 50 × 60 cm

• External Dimensions (W×D×H): 88 × 70 × 156 cm

• Weight: 140 kg

• Power Supply: 1-phase AC 220V, 50/60Hz

Standard Accessories Included

• UV Light Discoloration Tester main unit

• OSRAM 300W fluorescent UV lamp

• Turntable (35 cm diameter)

• LED timer

• Hot-air circulation system

• Operation manual

Items Excluded

• Replacement UV lamps (available as consumables)

• Calibration certificate (available upon request)

• Extended warranty (available for purchase)

• On-site installation and commissioning (available as a service)

• Grey scale for yellowing assessment (user-supplied per standard)

Pre-installation Requirements

• Stable, level floor with load-bearing capacity for the 140 kg unit

• Dedicated 1-phase AC 220V, 50/60Hz power supply

• Adequate clearance around the 88 × 70 × 156 cm unit for ventilation and door access

• Ambient laboratory conditions free from direct sunlight and strong vibration

• Operator training on UV lamp handling and high-temperature chamber safety is recommended

Key Benefits: Accelerated Yellowing Data Without Outdoor Weathering Delays

OSRAM 300W UV Lamp for Fast Results

The UV Light Discoloration Tester uses an OSRAM fluorescent UV lamp at 300W with an irradiance of (25 ± 0.4) W/m². The lamp spectrum targets the UV range that drives yellowing, and the 1000-hour service life gives you a predictable replacement interval. For materials that would take weeks to yellow outdoors, the chamber compresses the exposure into a usable laboratory timeframe.

Combined UV and Heat Exposure

Yellowing is not driven by UV alone. The chamber combines the 300W UV lamp with hot-air circulation up to 120°C, reproducing the combined stress of sunlight and heat that materials face in shipping containers or outdoor use. Temperature resolution is 0.1°C, so the heat component is controlled rather than approximated.

Turntable for Uniform Exposure Across Samples

The 35 cm turntable rotates at 3 rpm, moving samples through the UV field so no single position receives more or less exposure than another. For multi-sample runs, this reduces position-to-position variation in yellowing results.

Multi-Use Chamber for Aging and Drying

The unit functions as a UV yellowing tester, an aging oven, and a drying oven. If your lab needs basic heat aging or drying capability alongside yellowing resistance testing, the same chamber covers those applications without a second equipment purchase.

To explore how this UV Light Discoloration Tester fits into your footwear materials testing workflow, visit our website at Optimum Solution to compare related yellowing and aging test equipment. For detailed product specifications and application notes, you can view the GESTER UV light discoloration tester product page on the manufacturer's site. For information on yellowing resistance standards, refer to the ASTM-D1148 specification or the HG/T 3689 standard.

Solving the Problems That Slow Material Qualification Down

Struggling to reproduce the same UV exposure across test runs?
The OSRAM 300W lamp delivers a defined irradiance of (25 ± 0.4) W/m², and the 35 cm turntable rotates at 3 rpm to distribute exposure evenly. Each run starts from a documented lamp condition and sample position.

Concerned that heat alone or UV alone misses the real failure mode?
The chamber combines UV radiation with hot-air circulation up to 120°C. Yellowing in shipping containers and outdoor use involves both stressors, and the tester applies them together.

Tired of waiting weeks for outdoor yellowing to appear?
The 300W UV lamp accelerates the yellowing process. What takes extended outdoor exposure can be evaluated in a controlled laboratory timeframe, with the result read against a grey scale.

Need one chamber for yellowing, aging, and drying?
The GT-KD02 operates as a UV yellowing tester, an aging oven, and a drying oven. Labs with mixed material testing needs can cover multiple methods with a single unit.

Warranty and Support

We provide a 1-year manufacturer's warranty covering parts and labor. Technical support, installation assistance, and operational training are also available. Replacement parts and consumables are available throughout the product's service life.

Call to Action

Request a Quotation or Technical Datasheet: Contact us for more information, customized configurations, and solutions tailored to your specific requirements.