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Palladium patinas


#1

Anyone out there know of a way to blacken palladium? I’ve tried liver
of sulpher, black max, heat, pickle all the oxidizers I could come up
with. Can you help a brother out?

thanks!
Sally Brock
fancyjewels.com


#2

Hi Sally,

Anyone out there know of a way to blacken palladium? I've tried
liver of sulpher, black max, heat, pickle all the oxidizers I could
come up with. Can you help a brother out? 

Um, might be hard as it’s a platinum group metal, but it does form
an oxide film when heated (blue/grey depending on temp and duration
of heating). So this might be an option, but other than that I’m
stumped.

Etching might be an option too (long shot here) but you’d need
Aqua-Riga as I don’t thing nitric on it’s own has the oomph to etch
this metal…

Cheers, Thomas.
Janstrom Designs.


#3

Sally-

Besides heat treating the only other thng I can think of is black
Rhodium plating.

Kim.
www.kimericlilot.com


#4

My husband thinks that coating platinum with cooper and than
polishing the parts that are not to be blacken may do the trick. :slight_smile:

Danuta
www.goldcast.ca


#5

Hi

Have you tried iodine? That might work.

Daniel Ballard