No cost, no registration, no passwords -- just aloha, fun & authoritative answers
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Blackening Copper Platter with Silver Inlay from Ottoman Empire

2007

We have a large Copper Platter with Silver inlay from Turkey dating back to the Ottoman Empire. The Copper was originally Blackened but now some of the Black has rubbed off.
This probably occurred as we polished the Silver throughout the years. The Platter was bought in the Middle East, in an antique store.

Would anyone know how best to re-Blacken the Copper to return it to it's original beauty?
Thanks.

Andre Albert
Hobbyist - The Woodlands, Texas USA

I think that you can use alkaline ammonium persulphate solution: 7,5 gms ammonium or potassium persulphate
50 gm sodium hydroxide
1 lit water
Immerse your object in boiling solution(grease and oxide free)-immersion time 5-10 minutes -then rinse well and wax or lacquer it.

Goran Budija
- Cerovski vrh Croatia
2007

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: