Does sunlight discolour Slate-Lite?

Weathering results in hardly any or minimal uniform uniform deviations in the colouring.

Test method:
Resistance to UV radiation (UV-B) according to DIN EN ISO 11507
Test cycle: 4 hours; irradiation 50°C / 4 hours; thawing 40°C
Test duration: 1,000 hours with evaluation after 250h, 500h, 750h
Evaluation: colour change according to DIN EN ISO 11664-4, Sp62 Fa. X-Rite
Measuring geometry: d/8°, illuminant: D65