No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

How do I quick oxidate brass to get a black finish?

How do I quick oxidate brass to get a black finish? After the black finish I need a green corrosion on the top.

Markku Timo
Brass items - Sweden
2005

For small pieces You can use 200 gm copper carbonate ⇦ on eBay or Amazon [affil link] / 1 lit ammonia ⇦ on eBay or Amazon [affil link] solution (cold immersion process, bad smelling, work outside, protect your eyes and hands). If You want to add some green patina after that You can use 250 gm ammonium carbonate/25o gm ammonium chloride/1 lit water solution. Only grease and oxide free objects can be coloured!

Good luck!

Goran Budija
- Cerovski vrh Croatia
2005

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: