Mr. Rogers: "Look for the Helpers. You will always find people who are helping."
As an Amazon Associate & eBay Partner: we earn from qualifying purchases

finishing.com -- The Home Page of the Finishing Industry

-----

How to turn 18K gold to a glossy black colour?

Dear Experts,
I am a jeweller and have been asked to make a cuff style bangle in 18K gold. The bangle is a simple smooth cuff shape 11 cm long (along arm) and with a glossy black finish around a motif. As it is a bangle it may be sprung open slightly to fit on the wrist, and it will need to withstand knocking that is inevitable with cuffs. Can you please recommend how I can create a fit for purpose glossy black surface on my 18K cuff.
Thanks for any advice you can give.
Andrew,
Penang, Malaysia

Andrew Phillips
Jeweller - George Town, Penang, Malaysia
August 18, 2011

August 22, 2011

1.
Oil it with linseed oil(very,very slightly),then heat it to 200- 400 °C (slowly).Repeat if needs!

2.
copper or silver plate it and then colour it with liver of sulfur ⇦ on eBay or Amazon [affil links] solution

3.
plate it with black nickel or black chromium or black palladium

Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia

(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: