Grumpy The Grumpy Grease Monkey mechanical engineer. Staff member Mar 6, 2016 #1 you might want to fast forward to 9.20 and watch from there onward short answer plastic gets brittle if cold and melts if really hot Last edited: Nov 25, 2023
you might want to fast forward to 9.20 and watch from there onward short answer plastic gets brittle if cold and melts if really hot