Letter 1215

Antiquing Gold

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Does any one have any information on an environmentally safe/friendly solution to antique and/or blacken gold for an antique appearance? Would like to relieve and polish the gold after antiquing.

Bill Christiansen

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Bill,

As gold is very inert to oxidation the only method I know is to plate a thin coat of black nickel or "Electroblack" an Enequist (I think from NY) then relieve. Hope this helps.

Bob Lynch
     plating company
Sydney, Australia

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Bob:

Thanks for the response. We used to use Electroblack but removed it from our plant because of the hazardous chemicals. The latest Gesswein catalog has a product called

  • Oxaul Salts

which says it blackens gold.

Has anyone out there ever tried it? Is it safe to use? What about disposal? Thanks for your help.

Bill Christiansen

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Do you guys know what chemicals are used to antique copper and brass?

Thanks, Bill.

Bill Bleasdale

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Hi, Bill. Please see our FAQs on this subject at www.finishing.com/faqs/patina.html. Good luck.

Regards,


Ted Mooney, P.E. 
finishing.com
Brick, New Jersey

January 12, 2009

I have a 14K gold ring that has been processed with this blacked effect. I wanted to know if it is possible to reverse this process? this ring has alot of diamonds in it which were set upside down...quite unusual.

Suzanne Bakarich
- Martinez, CA, USA

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