Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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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
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
⇦this 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!
- Cerovski vrh Croatia
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