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topic 3055

How to patina brass


(1999)

Q. I'm looking for a way to patina brass sign letters. What do you recommend?

Tyler Brown
- Alexandria, Virginia


(1999)

A. Hello, Tyler. Although you can buy a commercial brass darkener [Brass Darkening Solution [linked by editor to product info at Rockler]] easy enough, there are just so darned many colors and shades that, unless you just want "dark", having a good picture of what you are seeking can be important. I think the best answer just might be: borrow this book from your library =>

"Colouring, Bronzing & Patination of Metals" [link is to product info at Amazon]
Richard Hughes, Michael Rowe / Hardcover / Published 1991

Good luck!

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


Contemporary Patination

(1999)

A. It depends on what color effect you're trying to get. Here's a couple formulas --

Verde: Copper Sulfate 8 parts, Ammonium Chloride 4 parts, Sodium Chloride 4 parts, Zinc Chloride 1 part, Glacial Acetic Acid 3 parts, DI Water 128 parts. This is a dip or brush on process. The coating needs to be preserved with some kind of sealer or lacquer to be stable.

Light Green: Ammonium Chloride 16 parts, Sodium Chloride 16 parts, Ammonium Hydroxide 16 parts. This formula supposedly is stable without preservative. Copper Sulfate can be added to darken the green color if desired.

The book mentioned in the previous letter is indeed excellent. There is also "Contemporary Patination" by Ron Young.

dave wichern
Dave Wichern
Consultant - The Bronx, New York


(1999)

A. Tyler - Several chemical companies have antiquing solutions available - Hubbard-Hall has Mi-Tique Patina. This is a room temp process for copper and brass.

Dan Brewer
chemical process supplier - Gurnee, Illinois



(2003)

Q. ADVICE ON LACQUERING OF ORNAMENTAL BRASS (AND STERLING SILVER), INCLUDING MIXTURE OF LACQUER AND THINNER AND APPLICATION METHODS INCLUDING POURING OVER SURFACES. ANY ADVICE AND RECOMMENDATIONS APPRECIATED.

THANKS,

JORY NEWMAN
- PIKESVILLE, Maryland


Brass Lacquer

May 20, 2010

A. Hi, Jory. Smoothness and consistency is important, so multiple very thin coats, sprayed or brushed, surely beats a poured coat. Good luck.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



Antiquing brass to bronze colour

February 25, 2014

Q. Hi, I have recently purchased some of John Penny cold patina solution. My goal is to turn it dark brown to a deep bronze colour. This works well but after a few days it starts to come off and a pink colour emerges. I am guessing this is the copper in the brass coming to the surface. Anybody had this happen after antiquing brass. Any ideas how to stop this happening?

Thanks

Alex

alex king
- eckington worcs uk



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