Generally, raw eggs can be kept for about 1 month at room temperature, 15 days at room temperature indoors in winter and 10 days at room temperature indoors in summer. Refrigerator temperature of 2-5 ℃, eggs can generally put about a month. Eggs refrigerator 3 months can not be eaten, has been bad, the surface, although it looks no difference, but the yolk inside has been stinking.

The optimal temperature for the preservation of eggs is 2-6 degrees Celsius, the optimal temperature for the preservation of eggs for seed is 10 - 13 degrees Celsius, the relative humidity of about 60% on the line, too low easy to dry, too high easy to mold.

Usually, fresh eggs have a shelf life of about one month, but only two weeks to ensure freshness. It's best to keep your eggs in the refrigerator at a temperature of 4 to 10 degrees Celsius. The low temperature of the refrigerator can slow down the rate of carbon dioxide and moisture dispersal within the eggs, prolonging their freshness.

Note: Eggs should not be kept in the freezer, as low temperatures can cause the eggs to coagulate and break the shells, and also change the proteins! Eggs should be placed with the tip facing down and the round end facing up. This is because the rounded end has air chambers, and having the chambers up keeps the eggs breathing, which also extends their freshness.

Tips for picking eggs:

First, shake the eggs. Thumb, forefinger hold down the egg shaking, no sound is fresh eggs, indicating that the whole egg air chamber, yolk integrity; sound is bad eggs, indicating that the eggs placed for a long time or the internal has been mold.

The second point, look at the shape of the eggshell. Fresh eggs eggshell complete, without any cracks, the surface has a layer of white powder, hand touch eggshell has a rough feeling. If there are cracks in the best to buy, the internal may have been infected, the eggshell color, there are pink, yellow or green, in fact, the nutrition are similar.

The third point, strong light exposure. Pick up the egg to the sun or cell phone flashlight, high-quality egg white, yolk clear, translucent, a small air chamber at one end; if it is not fresh eggs, it is grayish dark color, and the empty chamber is larger; old or deteriorated eggs will have stains.