No. Read my previous answer it has nothing to do with paper!
But I understand why you thought of that!
I may have mislead you by not emphasizing that it's not about paper but again it's about shape!
Nice try, but forget about the paper (it has nothing to do with paper) and think about the shape!
Imagine if you could inflate that envelope?
I hope this will help for someone to finally crack it!
I rest my case!