Adhesive remover for sealed envelopes?

My sister is getting a wee-bit freaked out over the fact that there's a date mistake on her wedding invitations. She's already sealed like 100 of them and wants to keep the engraved envelopes (which are pretty expensive apparently).





Is there a solvent or other thing out there made to remove envelope adhesives in a manner that keeps them a) intact and b) reusable.








Million thanks in advanceAdhesive remover for sealed envelopes?
I have also hear steam, but it has not been that successful for me. I still had to kind of mutilate the envelope to get it open. Try a dry iron on the sealed part with a thin cloth in between, not too hot. I have also heard putting the envelope in the freezer for a while until the glue hardens will work. Whatever you do, experiment with EXTRA envelopes first.


Alas, let this be a lesson, sealing the envelopes should be the very last thing you do when sending a large number of invitations or anything for that matter...right before you take them to mail, even after the stamps.Adhesive remover for sealed envelopes?
Steam from like an iron or however you can shoot steam up on the sealed part of the envelope, it will make it come open without damaging the envelope.
Steam! You can also use the tea kettle.
Yep, I heard that steam works too.