|Freshly broken egg shell|
Imagine, if you can, a stamp with a surface that comes to life with moisture. Well, these stamps had to be licked or wet somehow in order for them to adhere to the envelope being mailed.
Overly-ambitious licking might remove part of the "sticky" part. Damp hands, putting a stamp down in the wrong place, licking and changing your mind about putting it on an envelope, a damp environment over time--all thwart the glue on the back. The same is true of stamps that need moisture to bring glue to life. I am sure you all have stamp and glue issues even today.
What to do? Grab a pot of paste (kind with little stick on inside of lid) or find the mucilage. Those were our two choices. But, sometimes there was none in the house or not in sight. Maybe it had run out. We children always had mucilage and glue at school, but maybe there was none at home or none within reach.
At any rate, Mama would use the inside of a freshly-broken eggshell to stick stamps onto envelopes. It takes a long time for the inside of an egg to dry to an unusable state. So, she always had an egg shell handy. I do remember she sometimes cracked an egg in a cup and stored it in the refrigerator so she could have the "glue" inside the empty shell.
Once the egg was in the refrigerator, she had an eggshell full of "glue." Take your finger and rub some of the liquid onto the stamp and affix it to the envelope. Sometimes, then as now, envelopes, for whatever reason, lost their stickiness. So, the stamp can be glued onto the envelope. And, the envelope can be sealed for mailing--all by using what most people throw out.
I have used this method in the near past for resealing envelopes and for stamps that have lost their "sticky" attribute. As a matter of fact, I last used egg glue on an envelope and a stamp within the last three months.
Yes, I know there are glue recipes, but what can be easier than sticking a finger into a fresh egg shell and using the "glue" in the shell?
Have you ever used the inside of an egg for "glue?" Are you willing to try it?