Many years ago, I tested how well mineral oil did with preserving unrefrigerated eggs and, to my surprise, it worked surprisingly well. In fact, even untreated, unrefrigerated eggs lasted for weeks before going bad. (But I tested them each week in a glass of water to be sure.)
In the following video, he discusses how to use salt, wheat bran, various coatings (like lard), wood ash, and the best option of all: slaked lime water. Who knew? But then I don’t know how to acquire slaked lime other than buying it. He explains what to look for if you’re interested in this technique and then demos it near the end.
Personally, I’d stick with what we know works well in our modern world, and that’s using mineral oil. Eggs will last for months at room temperature using this technique without concern. But if you want more options, watch the following video…
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