Raw egg dating
The science behind this is based on the fact that eggshells are semipermeable, which means air can get through.
So the older the egg, the more air can penetrate its shell, causing it to float.
With Easter on its way, you’ll want to hurry up and test those raw shells, or the last one in the basket just might be a rotten egg.
The best kept secret in determining an egg’s freshness is to see if it sinks in water.
If you hear liquid swishing around inside, it’s gone bad. The sloshing sound usually points to an old, watery yolk.Just before you make that cheesy scramble, you need to observe the yolk and egg white once cracked onto a flat surface.Fresh eggs will have a bright yellow or orange yolk, where the egg white is slightly stiff and sits up around the yolk.So, you’ve got a carton of eggs in the fridge that has gone well past its sell-by date. All is not lost, as the printed date on the packaging doesn’t actually correspond to an expiration date.In fact, most store-bought eggs kept in the refrigerator remain fresh for weeks beyond the stamped date.
The white of a not-so-fresh egg will be more flat and spread out.