本文件规定了将试样暴露于人工辐射支持的交替室外风化的方法。这种方法尽可能利用自然的户外照射，然后在夜间和多云的条件下由人工辐射辅助。 本文件适用于聚烯烃材料以及产品和部分产品。 ISO 4892-1、ISO 4892-3和ISO 877-1、ISO 877-2和ISO 877-3分别描述了适用于本文件的人工和自然户外暴露及其实践。

This document specifies methods for exposing specimen to alternating outdoor weathering supported with artificial radiation. This method utilizes, as much as possible, the natural outdoor exposure which are then assisted by the artificial radiation during night time and in cloudy conditions. This document is applicable to polyolefin materials as well as to products and portions of products. The artificial and natural outdoor exposures and their practices applicable to this document are described in ISO 4892-1, ISO 4892-3 and ISO 877-1, ISO 877-2 and ISO 877-3, respectively.