from witf.org:
In his book On Food and Cooking, food scientist Harold McGee explains that fresh eggs' pH level of 8 makes the inner membrane of the egg adhere to the egg white. When three days old, the egg has a pH level of 9.2 and the problem no longer exists.
http://www.witf.org/a-la-carte/going-for-the-gold-pastured-eggs-april-2011
I found it very interesting since I'd decided for me that they needed to be at least 3 days old.
Somewhere I read that cold water will be absorbed into the shell, so I have been washing my room temp eggs with cold water and had a lot more luck with peeling.
In his book On Food and Cooking, food scientist Harold McGee explains that fresh eggs' pH level of 8 makes the inner membrane of the egg adhere to the egg white. When three days old, the egg has a pH level of 9.2 and the problem no longer exists.
http://www.witf.org/a-la-carte/going-for-the-gold-pastured-eggs-april-2011
I found it very interesting since I'd decided for me that they needed to be at least 3 days old.
Somewhere I read that cold water will be absorbed into the shell, so I have been washing my room temp eggs with cold water and had a lot more luck with peeling.