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UL 746C Test definition for the polycarbonate

Materials considered suitable for outdoor use have been subjected to ultraviolet (UV) light exposure and/or water immersion. UV exposure is performed by using either a twin-enclosed carbon weatherometer for 720 hours, or a xenon-arc weatherometer for 1000 hours. Water immersion testing is performed for 7 days at 70°C Specimens are tested before and after exposure for flammability, mechanical impact and mechanical strength.

Materials whose properties are not significantly degraded in any of these areas are considered to have passed and are suitable for outdoor use.

F1: The material has met both UV and water immersion requirements.

F2: The material has met either UV or water immersion requirements, or has only been partially tested.

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