To make boiled eggs easy to shell, you can put a little salt in the boiled eggs, and the boiled eggshells will be easily peeled off. Soak the eggs in cold water first, and then cook them in hot water. Eggs are not easy to break when cooking, and eggshells are easy to peel off. Soak the boiled eggs in cold water for a while, which can also make it easier to peel off the eggshell, but it is best not to use raw water, because bacteria in the water may enter the eggs through small holes in the eggshell.
Generally speaking, the fresher an egg is, the less likely it is to shell, because the adhesion between eggshell and egg white is related to the ph value of egg white. According to the determination, the pH value of fresh eggs is about 7, at which time the inner membrane has the greatest adhesion to egg white, so it is the least easy to shell after cooking. Eggs are living things and can breathe. After storage for a period of time, with the accumulation of metabolic wastes, the pH value of protein will gradually increase, and the adhesion between protein and intima will gradually decrease. When the pH value reaches about 8.8, the connection between the protein and the membrane is the most relaxed, and the egg is the easiest to shell after being cooked.