DIN EN ISO 16474-3:2014-03

Coatings of paints, varnishes and similar coating materials are exposed to laboratory light sources, in order to simulate in the laboratory the ageing processes which occur during natural weathering (outdoor exposure) or behind window glass. This part of ISO 16474 specifies methods for exposing coatings to fluorescent UV lamps, heat and water in apparatus designed to reproduce the weathering effects, which occur when materials are exposed in actual end-use environments to daylight, or to daylight filtered by window glasses. 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 when testing different materials. Specimen preparation and evaluation of the results are covered in other International Standards for specific materials. General guidance is given in ISO 16474-1. Fluorescent UV lamp exposures for plastics are described in ISO 4892-3. The committee responsible for this standard is NA 002-00-07 AA "Allgemeine Prüfverfahren für Beschichtungsstoffe und Beschichtungen" ("General test methods for coating materials and coatings") at DIN.