Meaning
Standardized exposure tests evaluate the resistance of colored textiles to the influence of an artificial light source. Laboratory technicians apply iso 105-b02 to determine if a fabric will maintain its appearance when displayed in retail environments or used in consumer homes. The protocol utilizes a xenon arc lamp with specific filters to mimic the spectral distribution of natural daylight behind window glass.
This test provides a consistent benchmark for global trade in apparel and home furnishings.
Xenon Procedure
Controlled environments maintain precise levels of humidity and temperature to prevent heat damage from being mistaken for light fading. During the application of iso 105-b02, specimens are exposed alongside blue wool references to ensure the light dose is accurate. The lamp operates at a specific irradiance level to accelerate the aging process without melting synthetic fibers.
Sophisticated cooling systems protect the samples from the intense heat generated by the bulb. Operators rotate the samples around the light source to ensure uniform exposure across all test pieces. This methodical approach reduces the variance between different laboratory results.
Performance Rating
Comparison between the faded sample and the original material results in a numerical score on the blue wool scale. Following the rules of iso 105-b02, a rating of five or higher usually meets the requirements for indoor garments. Materials that score below this threshold are often restricted to uses where light exposure is minimal.
The rating provides a defensible data point for quality assurance departments.
Global Standard
International supply chains rely on these standardized results to verify that dyed goods meet the specifications of the buyer. Adoption of iso 105-b02 ensures that a factory in one country produces goods that meet the expectations of a retailer in another.
