1 Scope

This International Standard specifies exposure conditions for paint coatings exposed to artificial weathering inapparatus including fluorescent UV lamps and condensation or water spray. The effects of weathering areevaluated separately by comparative testing of chosen parameters.

NOTE The ultraviolet light produced by fluorescent lamps simulates only part of the UV region of natural sunlight and,consequently, the test pieces are subjected to a small but destructive portion of the spectrum.

Due to the lack of visible and infra-red energy in the light from such UV lamps compared to sunlight, the testpieces are not heated above the temperature of the surrounding air in the way in which they would be inpractical use.

2 Normative references

The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.

ISO 1513, Paints and varnishes — Examination and preparation of samples for testing

ISO 1514, Paints and varnishes — Standard panels for testing

ISO 2808, Paints and varnishes — Determination of film thickness

ISO 3696: 1987, Water for analytical laboratory use — Specification and test methods

ISO 4892-1 : 1999, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance

ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling