What is ISO 16474-3 about?
ISO 16474-3 discusses paints and varnishes with a focus on weathering tests. ISO 16474-3 specifies methods for exposing coatings to fluorescent UV lamps, heat and water in apparatus designed to reproduce the weathering effects that occur when materials are exposed in actual end-use environments to daylight, or to daylight through window glass.
The coatings are exposed to different types of fluorescent UV lamps under controlled environmental conditions (temperature, humidity and/or water). Different types of fluorescent UV lamps can be used to meet all the requirements for testing different materials.
Note: Specimen preparation and evaluation of the results are covered in other ISO documents for specific materials.
Who is ISO 16474-3 for?
ISO 16474-3 on paint and varnishes test methods useful for:
- Paint and varnish manufacturers
- Product designers and developers
- Quality control personnel
Why should you use ISO 16474-3?
Paints and varnishes are valued for their longevity. A paint coating’s longevity depends on the weather conditions it endures.
ISO 16474-3 provides you with three test methods that recreate weather conditions the paint will endure in its lifecycle. These paint and varnish test methods are applicable to both internal coatings and external coatings.
Using the test methods elaborated in ISO 16474-3 will help you identify the performance of the paints in field conditions.
What’s changed since the last update?
BS EN ISO 16474-3:2021 supersedes BS EN ISO 16474-3:2013, which is withdrawn. BS EN ISO 16474-3:2021 includes some technical changes with respect to BS EN ISO 16474-3:2013. These include:
- The difference between the temperature of a black panel sensor and a black standard sensor has been corrected
- In Table 4 it has been changed that the black-panel temperature is not controlled during water spray
- The text has been editorially revised, and the normative references have been updated