I was wondering what material will deform less when exposed to the sun's heat.
The rings in the picture measure 155/165mm(6") diameter and 10mm high. They are hollow, the walls are just 0.8mm thick. Weight 14g.
They hung in the bare sun for about 6 hours. (temp today in the shade 22°C). All the time one side was exposed to the sun.
Two rings were printed in PLA, one black, one withe. A third was printed in
XT(black) and the last one in
nGen(bleu).
Extra weight on each ring 0.5L water.
After 6 hours three rings were deformed and got a bit narrower(left/right). They shrunk about 5 to 6 mm.
The fourth ring was clearly less deformed and shrunk only 2mm, surprisingly it was the white PLA that got less deformed. I expected the two PLA rings would suffer the most from the sun's heat.