I know of four ways of preserving fresh eggs in their shells that will keep them useable as 'fresh' eggs for months on end…up to a year anyway.
Limewater
Water glass
Brine
Lard, Oil
There are others, but they all rather change the egg into something not 'a fresh egg', iimmc. Dried, or seperated and frozen or cooked and pickled. All have their place and uses, but for fresh ones, the waterglass is really the easiest.
First try the egg in water. It ought not to 'float', but to sit 'in' the water, iimmc. Floaters are not good.
Water glass….one part sodium silicate to three parts water, and heat togther until it makes a syrup….good word for the consistency that you need. Simply immerse the eggs, make sure they are well coated, and completely coated, and lift out and sit on a cake rack to dry. (I'd re-dip the side that sat on the rack, just to be sure it was all coated) Store someplace cool and clean.
They can be packed dry in jars if there's a problem with mice, rats or other pests.
Lime isn't quite so simple, the eggs have to stay in the lime rich water, so folks used to use barrels. There's supposed to always be at least a handspan of lime water above the top layer of eggs, and the ones in the bottom can end up a bit of a mess as hte lime and gunk settles around them. Not my preferred method, but very popular in the past especially in countries with very warm weather. The lime does sometimes leave a taste on the eggs. I'm not fond of eggs anyway, but I do mind lime eggs that were a little, not off, just odd somehow. Still very useable though, and folks had lime available, while water glass cost them money.
I'll burrow out the instructions if you want them though.
Brine solutions….the eggs will float if you get the brine strong enough, so they need a wooden board put on top to keep them down in the liquid. Again, it's find a suitable container, and don't use thin shelled eggs. Some are more porous than others, more so if they've been cleaned, and the albumen can end up a bit watery for some reason. (I really need to do a chemistry degree, and my tech ref is away up a hill today
so I can't ask)
Lard used to be used to seal an egg….just brush on melted lard (mind you don't want to cook the fresh egg, just seal the shell to stop anything nasty getting in or the egg drying out too much) let it set a bit, then polish the egg. Honestly, the polishing just removes the excess but the fat seals the egg. Store in a single layer someplace cold.
The Auntie who did that type of preserving lived to be 93 though, so presumably it worked well
she ate dripping, lard, butter, full cream milk and was as fit as a fiddle to her last three months.
Oil, or last I heard folks were using vaseline, works too. Basically it seals the shell and stops any bacterial growth. The eggs need turned monthly if coated in vaseline or oil though, but it works, not sure how long it works, but can't see any reason it shouldn't last very well indeed.
With time the white become runny, don't beat up well, and the yoke skins get very fragile so eggs don't seperate well.
Good practice is to crack every preserved egg separately into a cup before use just to be certain that it's fine.
You like pickles….A two pint Kilner jar will hold a dozen eggs if they're pickled. Pickled eggs go well with salads, sliced on sandwiches, in packed lunches, and they can be used to make Scotch eggs if folks like chutney tasting ones. Not to everyone's taste, but very good food.
atb,
M