Hi Noel,
I am pleased to hear that Ronda and I got you excited about using
Argentium Silver! Ronda does her own casting, so she and Peter Johns
can give you help if you have any difficulties. When people ask me
who to send their castings to, I refer them to AU Enterprises in
Detroit (Linus Drogs). Everyone has been very pleased with their
results.
Do be sure to use the Pro version of the AS casting grain–it’s
better. In fact, Rio has discontinued the other version(s).
I enjoyed catching up with you at SNAG!
Cynthia Eid
‘argentium silver’ confuses me. Google gives me lot of false leads.
What is argentium silver vs 999 or Sterling?
Any silver that is at least 92.5% silver is Sterling, usually
alloyed with copper. Argentium alloys with metals other than copper,
so the 7.5 % is not all copper. Argentium is a trade name, there are
other alloys that have there own trade names. These alloys are
frequently more difficult to tarnish than the copper alloys.
Fine silver (.999) is 99.9 percent pure silver (basically not
alloyed) and is generally considered too soft to use for jewelry
(except as bezel wire).
John
Fine silver (.999) is 99.9 percent pure silver (basically not
alloyed) and is generally considered too soft to use for jewelry
(except as bezel wire).
I used it in one of my first pieces. I made a ring for my son (which
he has now grown out of. they grow so fast), he says he will keep it
for his son.
It’s rather crude, but it is constructed of 90/10 bronze bands, fine
silver sheet (protected by the bronze bands), and has a bronze and
fine silver mokume gane plate.
After the fact I learned a lot more about precious metals, and
possibly wont do anything like it in the future 
Kindest regards Charles A.