

The wax model
was then "sprued" up onto a wax tree for the next step. At
the bottom left of this page is a picture of many items sprued up into
the form of a wax tree.
The wax was then
"cast" into a material called "investment" which
has the consistency of pancake batter at first but hardens up to a solid
very quickly. A furnace was used to "burn out" the wax and
leave only it's impression in the solid investment material within the
flask.
The flask was then placed into a centrifuge and molten sterling silver
was slung into the voids left by the burned out wax. At the bottom of
this page are pictures of the metal being melted into a crucible inside
the centrifuge and the centrifuge spinning. Also shown are the flasks
inside the oven.
The sterling silver
forms are now removed from the flask and investment material. The rings
on the sprue tree are pictured below. To the right is a photo of three
unfinished rings which have been cut from the "tree."


The 8 x 6mm peridot
which will be set onto the ring
A
flex-shaft with grinding bit was used along with hand filing to remove
the extra silver from the sprue tree. The ring was shaped on a ring
mandrel to obtain the round shape.

More shaping and
polishing were done to fit the sterling stone setting onto the ring
shank. The setting was soldered onto the shank the ring cleaned with
'pickling' compound.


The maker's mark and metal content marks added.
More hand sanding
and polishing was done, then ultimately the peridot stone was set.




Wax Tree
Flasks in Kiln
Melting Sterling