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BS 2782-5 Method 552A-1999是关于《塑料试验方法.风化后光学和颜色特性.在透过玻璃的日光、自然风化和试验室光源下暴露后颜色和特性变化的测定》的方法。
Methods of testing plastics - Optical and colour properties, weathering - Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources