Is a tablespoon of borax too much for 500 grams of sterling?
Hi Jack, Try using way less borax for the fluxing. 500 grams silver
is right around 16ozt so we are talking "pinch". Like the bartenders
of old when the gold panners came in for a drink at the local saloon.
A drink would cost say a "pinch" of gold dust. Bartenders with big
fingers would have probably been hired first. But back to the
borax...just a small pinch. Watch for the surface of the melt to
clear and you are ready to go.
I took some of the scrap and sprues and melted them in the new
crucible with a tablespoon of borax and after 3 pours, I have yet
to get one till fill the sand mold. It just does not pour nicely.
Also you want to use some new metal with the old. A 50/50 mix
should work for what your doing.
The Alchemist Casting Shop
Seattle WA 206-933-9255