At GPT we can perform a large array of accelerated weathering including Xenon, Fadeometers Exposures (Single Arc and Twin Arc), and Sunshine XW Carbon Arc all with automatic temperature and humidity control, and variable light, dark, and water cycles.  Post exposure evaluations can include visual color evaluations according to AATCC or ISO Gray Scale, Instrumented Colorimetry Evaluations, gloss, haze, and microscopic evaluations.