Dear Sarah, Speaking as a jeweler (and former full-time wax
modelmaker) who uses castings almost exclusively, Yes! it is fine to
use castings for your production. But do not be fooled, it does not
always make production go faster. Finishing castings can be as
frustrating and sometimes more so than fabrication. When I get a
casting back from my casting house I must…
Cut off the nub of metal called the “sprue” and sand it down.
Sand the piece with 220 sandpaper (on a split mandrel on my flex
shaft) to remove the outer layer. (Sometimes I even start with a
rotary file before the 220- use with caution)
Sand it with 400 grit sandpaper to smooth it out
Use a variety of flex shaft and hand tools to clean up the nearly
Finally, I go through the usual bobbing to rouge routine.
I don’t want to discourage you, like I said, I use them almost
exclusively. Just don’t jump into it whole hog unless you’ve tried
cleaning a few first. Also, be aware that there is shrinkage if
final size counts.
-Jade “takin’ no flak from them pesky sprues” Moran
Jade Moran Jewelry
257 Highland Ave.
Somerville, MA, 02143