BS 2782-5: Method 550B:1996 - Method of testing Plastic- Optical and colur properties, weathering- Method 550B. Method of exposure to direct weathering, to weathering using glass-filtered daylight and to intensified weathering by daylight using Fresnel mirrors
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This International Standard specifies methods of ex- posing plastics to solar radiation, either by direct ex-
posure to natural weathering (Method A), to indirect solar radiation by modification of its spectral distribu
tion with glass to simulate ageing of plastics behind building or automotive window glass (Method B), or
to solar radiation intensified by the use of Fresnel mirrors to achieve acceleration of the weathering
processes (Method C). The purpose is to assess changes produced after specified stages of such ex- posures.
This International Standard specifies the general re- quirements for the apparatus and operating pro-
cedures for using the test methods described. Although this International Standard does not include
direct weathering using black-box test fixtures, atten- tion is drawn to this method of exposure testing of
materials under conditions simulating their end-use temperatures.ยน) Methods B and C exclude the effects of weathering
influences such as wind and rain, although the Method C apparatus used to produce intensified solar
radiation is equipped to provide moisture in the form of water spray.
Primary Item Type:
British Standard
Identifiers:
ICS 83.080
ISBN 0580261433
Language:
English
Subject Keywords:
Pyranometers; Pyrheliometers; Dyed blue wool references
BS 2782-5: Method 550B:1996 - Method of testing Plastic- Optical and colur properties, weathering- Method 550B. Method of exposure to direct weathering, to weathering using glass-filtered daylight and to intensified weathering by daylight using Fresnel mirrors
