Yes, ASTM G7 is technically equivalent to the parts of that describe direct exposures of specimens to the environment (excluding exposures behind glass). This equivalence is an official part of the standard's scope.
The scope of ASTM G7 covers virtually all nonmetallic materials susceptible to environmental degradation, including:
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Specimens should be exposed outdoors at the selected test site(s) with the following procedures:
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), gloss retention, chalking, cracking, checking, and blistering.
The performance of the test specimens should be evaluated periodically during and after exposure. Evaluation methods may include:
A key insight of the standard is that because of yearly climatological variations, a single exposure test cannot predict the absolute rate of degradation. Instead, multiple exposures over several years are necessary to obtain a representative result for a given location. When purchasing, ensure you are getting the most
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Extreme UV, high temperatures, and low humidity. 2. Specimen Orientation and Racking
Natural weathering combines diurnal temperature cycling, dew formation, rain erosion, pollutants, and full-spectrum solar radiation simultaneously.