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ISO 4892-1

ISO 4892-1 is the first part of ISO 4892; a guideline that describes how samples should be exposed to laboratory light sources.

The tests as described in ISO 4892 show in a short time the resistance of plastics to (sun) light and rain. This is why the tests are also called rapid weathering.

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Rapid weathering tests according to the quality standard ISO 4892

ISO 4892-1 describes the general process and scope of the standard. The standard applies to plastics. Among other things, ISO 4892-1 specifies the following requirements:

Water Quality

For ISO 4892-2, the following maxima apply:

  • 1µg/g solids;
  • 0.2 µg/g silicates;
  • Conductivity < 5 µS/cm (conductivity is not always proportional to silicate content).

For ISO 4892-3, the following maxima apply:

  • 2 µg/g solids;
  • 0.5 µg/g silicates;
  • Conductivity < 5 µS/cm (conductivity is not always proportional to silicate content).

Irradiance

Set point parametermaximum allowable deviation of the set point
At a single wavelength:0.02W/(m2-nm)
In broadband (300-400 nm)5W/m2

Temperature

  • At temperatures < 70°C, a maximum allowable deviation of ±5°C applies
  • At temperatures > 70°C, a maximum allowable deviation of ±7°C applies

Relative humidity

If control of relative humidity is required, it should remain within 10% of the set value.

Number of samples

The number of samples can be determined by the client. If nothing is agreed on this, the standard recommends at least three samples per material to be tested. The limits within which parameters such as temperature and humidity should fall.

Other parts of the standard ISO 4892 are:

  • ISO 4892-2: Xenon arc lamps;
  • ISO 4892-3: Fluorescence lamps (QUV test);
  • ISO 4892-4: open flame carbon-arc lamps.

Want to have your product tested according to the ISO 4892-1 standard?