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