Light fastness tester

Introduction

A light fastness tester is an instrument used to measure the resistance of materials, such as textiles, dyes, pigments, inks, plastics, and paints, to the fading and degradation caused by exposure to light, and it is used in the textile, paint, plastic, printing, and many other industries for quality control and product development. The light fastness tester exposes the test samples to a controlled light source, such as a xenon arc lamp or a carbon arc lamp, which simulates natural sunlight, including ultraviolet radiation, under controlled conditions of temperature and humidity, and it compares the change in the color or appearance of the tested samples with that of standard blue wool references, which are exposed at the same time; after the exposure, the samples are assessed for fading, and the light fastness is rated on a scale, typically from 1 to 8, with 8 indicating excellent resistance, and the test follows standardized methods, such as ISO 105-B02 for textiles. Light fastness testers are used for testing the light fastness of textile dyes and prints, for testing paints and coatings, for testing plastics and polymers, for testing inks and printing materials, for testing automotive interior materials, for testing building materials, for quality control, for product development, and for research, and they are available in various configurations, from small instruments for a few samples to large chambers for many samples, with features such as controlled light intensity, temperature, and humidity. With their accelerated light exposure, light fastness testers are essential for evaluating the colorfastness of materials.

Light Fastness Tester LBLT-T2010

Light Fastness Tester maintains temperatures from 10°C to 80°C, suitable for both cool and warm testing conditions. It controls humidity between 60% and 98% RH, ideal for high-moisture...

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Standards

ISO 105-B02:2014-Textiles-Tests for colour fastness-Colour fastness to artificial light: Xenon arc fading lamp test

Complies with the above standards, but is not limited to them.

Features

1. Light fastness tester for measuring color fastness to light of materials.

2. Xenon arc or UV exposure for accelerated light fastness and weathering testing.

3. Suitable for textile, paint, coating, plastic, printing, automotive and research.

4. Includes light source, exposure chamber, sample holder, controller and manual.

5. Supports light fastness and weathering testing for color durability assessment.

FAQ

Q1: What testing scenarios is this tester mainly applied to?

A: The light fastness tester is used in textile manufacturing, paint and coating, plastics, printing ink, automotive, construction, packaging and research to measure the color fastness to light (lightfastness) and weathering resistance of materials including textiles, paints, coatings, plastics, inks and dyes for quality control, product development and specification compliance. It supports textile color fastness to light testing (blue wool scale), paint and coating light fastness and weathering testing, plastic UV resistance and weathering testing, printing ink light fastness testing, automotive interior and exterior material weathering, building material weathering, and packaging material light stability testing. The accelerated light exposure provides standardized, reproducible testing of color durability and material degradation, supporting product development and quality assurance across multiple industries.

Q2: What standards does the tester comply with?

A: The light fastness tester follows relevant ISO, ASTM, AATCC and GB/T standards for light fastness and weathering testing depending on material: textiles follow ISO 105-B02, AATCC 16, GB/T 8427; paints follow ISO 11341, ASTM D4459, ASTM G155; plastics follow ISO 4892-2, ASTM D4329, GB/T 16422.2. The hardware complies with IEC 61010 laboratory safety standards. Calibration should use certified reference materials (blue wool standards for textiles, polystyrene reference for plastics) traceable to international standards.

Q3: What is the warranty period for the whole tester and key components?

A: The whole light fastness tester is covered by a 12-month warranty. The light source (xenon arc, UV), exposure chamber, sample holder, controller and housing are covered, while lamps, filters, reference standards and fuses are consumables or accessories. Damage from improper use or unauthorized repair is excluded. Extended service contracts are available for this testing equipment.

Q4: Is this device difficult to operate? Is professional training required?

A: Operation requires trained laboratory personnel familiar with light fastness testing, sample preparation and standard methods. We provide operation manuals, training and application support. Proper sample preparation, light source selection, exposure condition setting, reference standard use, endpoint determination, result evaluation and interpretation are important for accurate, reproducible light fastness results.

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Light source output and spectrum calibration recommended every 6-12 months or per lamp hours. Reference standard (blue wool) verification per test. Lamp replacement per usage hours (xenon lamps typically 1500-2000 hours). Irradiance sensor calibration periodically. Full system performance verification annually. Routine cleaning of exposure chamber and filters.

Q7: Are supporting consumables universal?

A: Lamps (xenon, UV), filters, reference standards (blue wool), sample holders and cleaning supplies are available from laboratory suppliers, though lamp type should match the instrument. Long-term consumable cost depends on test volume and lamp usage.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes light source type (xenon arc, UV fluorescent), capacity, irradiance control, temperature/humidity control, water spray (for weathering), sample holder type, software features and accessories. Additional lamps, filters and accessories can be ordered separately. Custom orders extend delivery lead-time.

Q9: Does the purchase include on-site installation and commissioning service?

A: Yes, light fastness testers include on-site installation, commissioning, calibration and operator training by certified specialists. Site preparation guidance is provided before delivery.

Q10: What types of samples are compatible with this equipment?

A: The light fastness tester measures color fastness to light of textiles, paints, coatings, plastics, inks, dyes and other materials within the sample size, exposure condition and specification. Different materials require specific test methods, light sources (xenon arc for full spectrum, UV for accelerated UV), exposure conditions (irradiance, temperature, humidity, water spray) and reference standards. Samples should be properly prepared (mounted, protected from contamination) and include appropriate reference standards (blue wool for textiles). Users should select the appropriate test method for the material type (ISO 105-B02 for textiles, ISO 11341 for paints, ISO 4892-2 for plastics), use certified reference standards (blue wool 1-8 for textiles), set appropriate exposure conditions per method, include unexposed control samples for comparison, determine endpoint per method (color change to match reference standard or specified exposure time), evaluate color change using gray scale (ISO 105-A02) or colorimeter, report results with test method, light source, exposure conditions and reference standard specified, and for product specification, compare with required light fastness grade (e.g., textiles: grade 4-5 for apparel, 6-7 for upholstery; paints: specified hours of exposure). The exposure chamber should be cleaned regularly. Lamps should be replaced per manufacturer schedule (track lamp hours). For weathering testing (with water spray), use proper water quality (deionized or distilled). The instrument should be placed in a well-ventilated area due to heat generation. Samples should be mounted properly (flat, no stretching for textiles) and protected from contamination during handling. For automotive materials, follow specific OEM specifications (SAE J2412, SAE J2527). The light fastness grade should be reported with the test method, as different methods may give different results.