BS 2782-5 Method 550A:1981

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Methods of testing plastics. Optical and colour properties, weathering, Methods of exposure to natural weathering — 10 стр.

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BS EN ISO 877:1997

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Plastics. Methods of exposure to direct weathering, to weathering using glass-filtered daylight, and to intensified weathering by daylight using Fresnel mirrors. — 34 стр.