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Egg Freshness Tests

Egg Freshness Tests

Egg Freshness Tests

The goal is always to collect eggs as soon after they are laid as possible. Occasionally though, you may run into a situation where you are not 100% sure how recently an egg was laid. In this circumstance, it’s a good idea to test the egg for freshness before putting it in your fridge.

The quickest way to identify really old eggs is with your nose. When an egg rots it emits hydrogen sulfide, which is hard to miss. If it smells like “rotting eggs” then don’t even think about eating it!

Assuming the egg smells fine, you will need to do some detective work to understand what is going on inside the shell. There is a small air pocket inside the egg that increases in size the longer the egg is outside the hen. Basically, the shell is porous and as moisture evaporates out of the shell, it is replaced with air that goes into the shell.

One way to measure the air pocket is by using an egg candler. If you shine the candler through the egg in a dark rook you should notice a small air pocket at the top. Measure and evaluate the air pocket as follows:

  • Fresh: 2/16” or less
  • Aging: up to 3/16”
  • Old: over 3/16”

We offer the following candlers:

Egg Candlers We offer several candlers options depending on how you plan to use them.
  jiffy way egg candler This top-of-the-line egg candler offers best visibility into eggs.
Price: $29.95
  cool lite tester This candling light comes with 5' cord so you don't have to move eggs.
Price: $19.95
  egg light This bright white LED flashlight is an affordable way to illuminate eggs.
Price: $9.95


Another way to check the size of the air pocket is to submerge the egg in water. The larger the air pocket, the more the egg with try to float. You can evaluate the egg as follows:

  • Fresh: Lies totally flat (horizontal) on the bottom
  • Aging: Tips slightly, large end up
  • Old: Sits vertically, small end on the bottom, large end on top – or – it floats


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