Ok let me clairify,AFAIK,the outer membrane is white and papery looking typically, it's the inner membrane that shrink wraps the chick. I think they need more time to absorb yolk and blood. I'm no expert though, so feel free to ignore.
The membrane right under the shell that I opened was totally 100% dry, like that old onion skin typewritter paper for those old enough to remember that.
The membrane inside between the chick's body, and the interior of the air cell through which they have poked their beaks (between 10-50% of break protruding through)
is ALSO looking exactly like the other membrane, ie dry white onion skin, except in the case of EggB, the central area I can see is less dry more see through, but has distinctly a red vien running in the middle of it laying on top of the chick (like if the chick had hit that it would have bleed out already). So clearly Egg E needs more time (several hours??).
But in all the cases that inner membrane is totally plastered against what I can see of the chicks (all dark feathers btw) and it looks to me like they can't even wriggle under it, they can move their beaks ever so slightly to chirp a little, but they can't really spin or lift their head to even push through that thin little membrane or tear it farther for what I can tell squinting into the tiny holes I made. I maybe miss judging, this is the first time I've ever seen this...
My concern on time is at least 1 chick peeped about midnight last night - that is 14 hrs ago, & W w/ only 10% of beak through membrane sounded very very weak in its couple of peeps, so if that one internally piped 14 hr ago should I break it out now, or keep waiting??