John Savage wrote:
I've been puzzled by the uniformly-toned eggs we buy from the supermarket,
and am left wondering whether these are the product of brown/black hens,
or are the product of white hens but dipped in a brown dye bath to satisfy
'changing consumer demands'. The eggs, not the hens. :-)

To assist in solving this, I'd like to hear from people who raise
their own chooks: after you empty the shell and peel off its translucent
white membraneous liner, is the revealed inside surface of the shell the
same brown tone as the outside, or is it white even when the shell's
outside is brown?
--
John Savage (my news address is not valid for email)
These are the result of cross bred hens. The uniform size is caused by
their grading process and the colours are probably graded that way too.
But never fear nothing is wasted and all the egs not conforming get used
in other ways. But it causes a major waste in resources in labour to do
this. Supermarkets making the demand as a rule.

Re dyeing eggs, Dont think its necessary, but could be done I suppose,
but creates another process which I think they would rather avoid. Its
cheaper to just grade them.