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# Long description

Figure 8a is a photograph that shows Argus Gentle holding new roofing material in his hand. The material is very bright so it looks like the Sun's light is reflecting from it like a mirror. He holds it in front of a white corrugated roof. Figure 8b is a colour coded infrared image that shows the corrugated roof (figure 8a) coloured orange, and the sample of the new material colour coded black, cooler than the roof behind it.