ASTM G24-2013 is free to download.The title is Standard Practice for Conducting Exposures to Daylight Filtered Through Glass.
Since solar radiation, air temperature, relative humidity and the amount and kind of atmospheric contaminants vary continuously, results from exposures based on elapsed time may differ. The variations in the results may be minimized by timing the exposures in terms of.
Note: Can you help me share this website on your Facebook or others? Many thanks!