Eggs are a common household food. Sometimes eggs need to be stored. Do you need to wash the eggs with water before storing them?
Causes of egg washing deterioration
Generally, domestically raised eggs, also known as grass-based eggs, are dirty when they are first bought. Those who love cleaning will clean the eggs and put them in the refrigerator. In fact, this approach is not correct, because cleaning eggs will destroy a layer of membrane of the eggshell, the function of the membrane is actually to resist microorganisms and bacteria. After you clean it, you will lose this protective film, and then you may spoil the eggs. So, don’t wash the eggs if you don’t want the eggs to deteriorate too quickly.
In fact, there is a film on the outer surface of the eggshell, which is easy to wash off with water. The egg itself is the skeleton structure. There are many small holes on the surface, and then wash away the film, bacteria quickly invade the small holes, this kind of bacteria is called Salmonella. This kind of Salmonella infects eggs, poisons the human body, greatly shortens the storage time of eggs, and is the root cause of the deterioration of washed eggs!
Although the small egg looks fragile, it has a complicated structure. The eggshell alone contains five different layers of substances.
From the inside to the outside of the eggshell are the first inner membrane of the eggshell, which is the membrane that we sometimes see when we peel eggs, followed by the outer membrane of the eggshell, the papillary cone layer, the palisade layer, and Eggshell membrane.
The outer surface of the eggshell looks very dense, but it is actually a porous structure, which is used for ventilation when the internal life evolves.
Washing eggs with water can easily lead to bacterial invasion, evaporation of water, and deterioration of eggs.
Commercial eggs are mostly washed during processing, and after washing, a layer of edible light mineral oil is applied to the surface of the eggs to protect them. Even if it has not been washed, the clean and fresh eggs have their own protective film, which makes it difficult for bacteria to invade. At this time, if the eggs are additionally washed, health risks will increase.
“Dry cleaning” is the first choice for cleaning eggs
But if you find that the surface of the egg is dirty, it is better to clean it. In order to affect the protective film as little as possible, the preferred method is “dry cleaning”, and do not excessively touch the clean place, so as to make the protective film as complete as possible. And the storage of eggs should be after cleaning, so complete the cleaning, and then put the eggs in the refrigerator.
The correct operation method of egg washing
If the eggs you bought back have a lot of stains, they must be cleaned. You can follow the steps below.
When washing eggs, you must not soak the eggs directly in water, as this will easily cause pollution. The correct way is to first moisten the surface of the eggshell, then wipe off the dirt with a wet wipe, and finally, rinse it off.
The temperature of the water for washing eggs is preferably higher than the egg temperature, and the temperature is between 36’C and 38’C. This is done taking into account that eggs have stomata, and water whose water temperature is higher than the egg temperature cannot easily enter through the stomata and enter the egg.
After washing the eggs, it is best to scald the eggs with hot water at 90C to 95C for 2 to 3 seconds, and then dry the surface before storing. After this treatment, the shelf life of the eggs will not be shortened but will be extended.
In summary, it is best not to clean the eggs you bought. If there are not many stains, you can choose “dry cleaning”, that is, wipe it with a cloth; if you must wash the eggs, remember to follow the correct method above.