The problem is I am not sure if they can be fired with the ACS.
Does one need to prepare the sterling in some way, prior to firing,
and do you need to pickle it after firing. What is pickle made of,
do you have to purchase it or can you make it.
Pickle – you buy it from your favorite jewelry supply house. Sparex
#2 is the brand. Or buy PhDown or SpaDown from a pool supply store.
Target even has it in the summer.
You can depletion gild your sterling findings, which means to “bring
up the fine silver” to the surface by repeatedly heating and
pickling. You can find more detailed directions, I’m sure, by
searching the archives here.
However, you can only use sterling with metal clay if you fire it at
one of the lower temperatures, since at higher temperatures the
sterling will become brittle.
I would suggest you buy fine silver findings from Metal Clay
Findings or Art Clay World, and use those, then you can fire up to
1650 for as long as you like.