I've not been following this thread closely, so forgive me if I'm off in
the weeds with this. For this application, is it critical that the
copper be solid or at least thick? If the egg need only have a high
conductivity surface, how about covering a plastic Easter egg with
copper foil tape? The edges can easily be soldered to adjacent strips
for a continuous conductive surface, and the solder joints can be plated
with copper by immersion in a copper sulfate solution for aesthetic
metallic continuity, or you can use Bondo and paint for a really smooth
finish. Do they still sell Leggs pantyhose in the plastic eggs?
Regards, Gary Lau
MA, USA
> Original poster: FutureT@xxxxxxx
> >But here's the question.. does your egg have to be conductive or
> >magnetic? Why not aluminum, which is still cheap, also easy to
> >machine or cast.
>
>
> I once machined an aluminum egg for Harry Goldman to use in his
> Egg of Columbus machine. The egg refused to spin up to a vertical
> position. It spun but stayed on it's side. I don't know if that's
> because I didn't make the shape just right, or if the machine lacked
> enough power. Harry suggested that a lot of power was needed to
> deal with a heavy solid egg. Harry had good success with various
> hollow eggs of aluminum. I forget if he tried other metals.
>
> John
>