GB/T 43716-2024
Textiles - Test method for luminous afterglow performance - Luminometer method (English Version)
- Standard No.
- GB/T 43716-2024
- Language
- Chinese, Available in English version
- Release Date
- 2024
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China CN / GB
- Latest
- GB/T 43716-2024
- Introduction
Interpretation of the Luminous Afterglow Performance Test Method for Textiles - Luminometer Method
With the widespread application of functional textiles in the fields of nighttime safety protection and outdoor clothing, higher requirements are placed on the luminous afterglow performance testing of textiles. This standard GB/T 43716-2024 "Luminous Afterglow Performance Test Method for Textiles - Luminometer Method" provides a scientific basis and operating specifications for evaluating the luminous afterglow performance of textiles.
Background and significance of standard formulation
This standard is managed by the National Technical Committee for Textile Standardization, and the main drafting units include Shanghai Customs Industrial Products and Raw Materials Testing Technology Center and other authoritative institutions. The introduction of this standard fills the gap in the domestic test method for the luminous afterglow performance of textiles and provides a unified technical basis for the quality inspection of related products.
Explanation of professional terms
- Luminated afterglow property: refers to the ability of textiles to continue to glow in the dark after absorbing ambient light energy, usually evaluated by brightness and decay time.
- Luminance: A quantitative indicator of the luminous intensity of the surface of a textile, measured in candela per square meter (cd/m²).
For example: The afterglow brightness of ordinary luminous fabrics usually ranges from 10 mcd/m² to 500 mcd/m².
Testing instruments and equipment
The textile luminous afterglow performance tester specified in this standard consists of the following key parts:
Component name Function description Technical requirements Excitation light source Provide uniform illumination to activate the luminous properties of textiles. Color temperature range: (650 ± 50)K; illuminance stability is better than 1%. Brightness meter Measure the luminous intensity of the textile surface. Test range: 1~10,000 mcd/m²; the indication error does not exceed ±5%. Luminance meter Measure the ambient light intensity to ensure the accuracy of the test conditions. Measurement range: 10 lx~10,000 lx; indication error does not exceed ±4%. Test steps and implementation suggestions
- Sample preparation:Select representative samples and cut at least 3 circular samples with a diameter of (50±1) mm. If the luminous area is small, it can be spliced into a standard size to ensure no overlap.
- Humidity conditioning:Place the sample in a light-proof container and adjust the humidity for more than 24 hours under standard atmospheric conditions away from light.
Detailed description of test steps
- Excitation light source adjustment:Turn on the instrument, adjust the average illuminance to (1000±10)lx, and keep it stable for 20 minutes.
- Sample placement and saturation:Place the sample in the test position, making sure the luminous surface faces upward. Irradiate vertically until the afterglow brightness of the sample changes within 5%, and record the excitation saturation time.
- Afterglow measurement:After turning off the light source, immediately start the luminance meter and start recording the brightness value per minute until it decays to less than 10 mcd/m².
Test result analysis and processing
The test results include afterglow brightness value and decay time. The average value is calculated according to formula (1):
$$ \overline{L} = \frac{\sum_{i=1}^{n} L_i}{n} $$Wherein, $\overline{L}$ is the average afterglow brightness value, $L_i$ is the brightness value at the i-th minute, and $n$ is the number of measurements.
Test report requirements
- Basic information:Including standard number, sample description, etc.
- Instrument information:Brightness meter type (such as light shielding tube type, imaging type) and model.
- Test conditions:Ambient temperature and humidity, illuminance, excitation saturation time.
Implementation recommendations
To ensure the accuracy and consistency of the test results, it is recommended that:
- Strictly select and calibrate instruments and equipment in accordance with standard requirements.
- Operators should receive professional training and master the correct testing methods.
- Establish quality control processes in mass production and regularly verify the accuracy of testing equipment.
GB/T 43716-2024 Referenced Document
- GB/T 6529 Textiles.Standard atmospheres for conditioning and testing
- GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 43716-2024 history
- 2024 GB/T 43716-2024 Textiles - Test method for luminous afterglow performance - Luminometer method
