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


-----

How can jeweller stop bronze from going green

Hi There:
My name is Luciana and I am a jewelry designer and work with the lost lax technique. I have always worked with silver , but this time I decided to cast my pieces in Bronze to lower the cost. I have a applied a tarnish (that I bought in a jewelry shop) but it went green anyway.
Please , I need help!!! I have about 50 pieces that I am planning to sell in a market stall and need to solve this problem urgently.
How can I stop it from going green?

many thanks
Luciana

Luciana Morera
designer - London, United Kingdom
August 15, 2011

---

First of two simultaneous responses -- August 17, 2011

If your alloy is correct, you have some chemical causing the problem.
My uneducated guess is to polish it very well and apply a hard wax coating (like carnuba)
Another alternative is to polish and apply a spray coating of an auto clear coat or similar.
I have seen good results on professionally treated brass lamps which are a lot harder to prevent corrosion on than on bronze.

James Watts
- Navarre, Florida

Try Everbrite [a finishing.com supporting advertiser] coating.Hope it helps and good luck!

Goran Budija
- Zagreb,Croatia
Second of two simultaneous responses -- August 18, 2011