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ASTM D4459: Xenon-Arc Exposure of Indoor Plastic Applications

Understanding ASTM D4459: Standard for Exposure of Plastics to Xenon Arc Radiation

ASTM D4459 is a standard developed by ASTM International, dedicated to simulating the effects of solar radiation on indoor plastics using xenon arc light with window glass filters, following practices G151 and G155.

Objective and Importance of ASTM D4459 Standard

The standard aims to faithfully reproduce the sunlight conditions affecting indoor plastics, employing specific methodologies to ensure result accuracy.

Methodology of ASTM D4459 and Associated Practices

This standard relies on precise exposure methods, including the use of fluorescent and UV lamps in accordance with ASTM D4674, to mimic exposure to indoor light and daylight filtered through glass.

Key Factors Affecting ASTM D4459 Testing

Factors such as voltage regulation, temperature and humidity control, as well as the condition of lamps and filters, are crucial for result reliability, emphasizing the importance of detailed reports.

Reproducibility of Tests and Material Evaluation

The standard ensures satisfactory reproducibility of results between laboratories, especially when assessing material stability in terms of performance. The use of a control sample is recommended for effective comparison.

Why Use ASTM D4459?

In summary, ASTM D4459 is an essential technical reference for evaluating the durability of indoor plastics under specific light conditions, thus ensuring a reliable methodology for stability testing.


ASTM D4459 is a standard established by ASTM International. It is designed to simulate the effects of sunlight on indoor plastics using xenon arc lamps with window glass filters.

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