why are some boiled eggs impossible to peel cleanly while others come off smoothly?

Question

why are some boiled eggs impossible to peel cleanly while others come off smoothly?

In: Chemistry

Answer 1

Hard-boiled eggs can be hard to peel if they are fresh because the egg shrinks inside during storage, pulling the inner membrane away from the shell. Older eggs are better candidates for hard cooking because the shell becomes easier to peel as the contents of the egg contracts and the air cell enlarges.