Figure 24. Front and back faces of the low-velocity-impacted PVC 20-hour
specimen. The difference in the color is because the front face was closer
to the light source, while the back face was away from it. This is not seen in
case of 200-hour samples, as the specimens were rotated about the same
position after every 20 hour.
Figure 25. Front and back faces of the low-velocity-impacted PVC 200-hour specimen.
Figure 26. Front and back faces of the low-velocity-impacted PC specimen.
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