I read published specs for bagging film indicating 300% to 450% elongation. When I study the tutorial videos on resin infusion, I see everyone using pleats. Is it really necessary to add pleats when the film will very likely stretch as much or more than the depth of the female cavity in the mold (mould)?   I can easily imagine that a car bonnet would not require any more than 150% elongation. Could that be done without pleats?


A Lifelong Learner

Thank you @Hanaldo. This gives me a better understanding of the process. As you mention "you will see videos of people doing it". This is exactly the issue with many of the YouTube videos on this subject. The differences between the techniques that are presented are not well explained and I am trying to sort out the real science behind the infusion process.


A Lifelong Learner