I purchase platinum sterling from Allura Metals, International.
AlluraMetals.com. It’s the only place in the world to buy that metal, they
have a patent on it. I’ve been working with it for 8 years, I have a lot of
experience with it. They also make palladium sterling.
I use silver solder when I want to oxidize the piece because…10k white
gold solder doesn’t tarnish.
I use 10k white gold solder when I want the metal to be polished and for the
seams to not show. As in ring sizing. I use 10k white gold solder because
that’s what Allura told me works. They’re correct, it works.
You can purchase 10k white gold solder from any supplier like Fell, or
Hoover&Strong, or OttoFrei, or Rio, or Stuller.
I would go onto AlluraMetals.com to find the melting temp of palladium
sterling to be sure, but 10k melts pretty low. If you’re still in doubt,
call Allura Metals and ask them. Where did you buy your palladium sterling?
Call them and ask them for the melting temp. Compare that with 10k melting
temp, which you can find on any web site that sells it.
I hope that helps.