How To Open Sealed Envelopes Without Ripping Opening Sealed Envelopes Without Ripping Them?

Opening sealed envelopes without ripping them? - how to open sealed envelopes without ripping

I played an adventure game like a child in a mystery has been solved initiate the participation of an envelope without it again, put in the microwave with a glass of water, and opened it.

So I e-mail me telling a random note can not be closed properly, by opening them in the freezer.

I have not actually tried one of these to do, but from experience can anyone tell me whether it really works (* none * of these)?