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Artificial weathering was selected as one of the steps in the study to decrease the amount of time required to age the samples while imparting changes due to weathering.

Weathering Cycle

The weathering cycle selected for the study is 4 hours of UV light exposure at 60 degrees Celsius (~120 degrees Fahrenheit), followed by 4 hours of condensation in the dark at 50 degrees Celsius (~140 degrees Fahrenheit). This cycle will be repeated for a period of 800 hours. Calibrating the irradiance and temperature of the QUV prior to performing the experiment is important to ensure accurate and repeatable test results.

Limewash Experiment: QUV Rating

Limewash Experiment: QUV Rating

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