DIN 53387:1989-04

1 Scope and field of application
2 Concepts
      2.1 Criterion of ageing
      2.2 Radiant exposure
      2.3 Ageing behaviour on exposure to laboratory
             light sources
3 Principle
4 Designation
5 Apparatus
      5.1 Exposure apparatus
             5.1.1 Artificial light source and filter
                      system
             5.1.2 Conditioning of test enclosure
             5.1.3 Device for wetting specimens
                      (Method 1)
             5.1.4 Specimen holders
      5.2 Black standard thermometer
      5.3 Exposure meter
6 Preparation and shape of specimens
      6.1 Specimens for determining changes in
             properties by destructive testing
      6.2 Specimens for determining changes in optical
             properties and surface condition by non-
             destructive testing
7 Number of specimens
8 Conditioning of specimens
9 Procedure
      9.1 Mounting of specimens
             9.1.1 Mounting without backing
             9.1.2 Mounting with backing
             9.1.3 Blanks
      9.2 Black standard temperature
      9.3 Irradiation of specimens
      9.4 Wetting of specimens and relative humidity in
             the test enclosure
      9.5 Exposure of specimens together with control
             specimens made of reference material
      9.6 Exposure time
      9.7 Storage of specimens after exposure
10 Testing of specimens after exposure, and evaluation
      10.1 Destructive testing
      10.2 Non-destructive testing
11 Test report
Standards and other documents referred to
Other relevant documents
Previous editions
Amendments
Explanatory notes

The exposure of plastics and elastomers to laboratory light sources is a method of artificial weathering designed to accelerate and standardize the ageing process as compared with outdoor (cf. DIN 53385) or indoor exposure (cf. DIN 53388) while enabling this process to be measured.