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Antique green patina recipe for brass?
Q. I am trying to get an antique green color patina on brass using a recipe that simply calls for
1 gallon water
8 oz. nickel ammonium sulphate
8 oz. sodium thiosulphate
"simmered" at 160 degrees until desired color is obtained. I used a hotplate, a pyrex container, and a thermometer; everything seems in order.
I got an icky brownish-black patina. I started with cleaned (sanded and pumiced) brass. Any thoughts or better recipe suggestions?
Thanks,Amy L [last name deleted for privacy by Editor]
jewelry - Brooklyn, New York
Q. I'd like to know how to do this, too!Kerry F [last name deleted for privacy by Editor]
- Fort Knox, Kentucky
A. I just found a patina but have not tried it out. I think it should work since I know ammonia was a main ingredient of a green patina used in my high school metals class.
2 parts white vinegar
1.5 parts non-detergent ammonia
.5 parts non-iodized salt
Good luck!Becky K [last name deleted for privacy by Editor]
- Vonore, Tennessee
I need a technique to make polished Brass to Old Green Brass finish. And also any method to make finish to last?Gurmeet S [last name deleted for privacy by Editor]
hardware and metal exports - Noida, UP, India
Has anyone gotten the green result?
if so....was it the technique w/the ammonia....or another way....
- Iowa City, Iowa
A. For a green patina on brass or bronze use a mixture of cupric nitrate (1 teaspoon to 8 oz of distilled water). Heat up the brass with a torch until water just boils off of it and spray or dab on the mixture with a natural bristle brush.Dan R [last name deleted for privacy by Editor]
- Los Angeles, California
A. I tried Cat Litter (non clumping) [linked by editor to product info at Amazon] and white vinegar, enough to wet the litter through ... this was with copper and it turned a beautiful greenish blue.Eva Hill
- Franklin, Tennessee
February 5, 2008
Q. I'm trying to achieve various browns using the fume/vapor patina method. Are there any other patineers using this technique out there?José Ventura
I'm a patineer - Koelenhof, Western Cape, South Africa
April 25, 2008
A. Go to: www.ssschemical.com for pre-made patina solutions and chemicals to make your own.
You can get a pretty good green-blue on brass or copper with: copper sulfate, ammonium chloride (or plain clear liquid ammonia) and distilled water. Adjusting the amount of copper sulfate will adjust the amount of blue you get.
Am. Chlor. will impart a yellow green, while ammonia will give more of a blue.
- Sanford, Michigan
November 5, 2011
A. Hello everybody!
I make it myself from 7 different compounds, but may you watch the video. It works great, the only thing is that you may use ONLY A VERY LITTLE AMOUNT of the cream... You don't have to buy it, if you write me a letter I can send you the ingredients... I'm selling the product on eBay. It makes a greenish-brownish patina, color depends on the alloy. Hope it helps. Again this is not suppose to be an ad, I can give you the formula for free, I've been experimenting for 3 months on this one and it works for sure.
- Ritzing, Burgenland, AUSTRIA
September 20, 2015
A. Here's what I did.
1. Give brass an ammonia bath, let dry.
2. Give brass a heavy salt water bath, let dry.
3. Heat oven to 350. Line a pan with non stick foil. Dab on some Nair. That's right - the hair removal stuff.
4. Bake letters till dry.
5. Repeat process above if not enough green for your taste.
My mailbox letters are now an aged, green color.
- Grapevine, Texas, USA
Hi D. Thanks! ... but I think people should use an old toaster oven in the garage if they want to try stuff like this. Putting materials of this nature into your food oven is not a good idea.
Ted Mooney, P.E. RET
Pine Beach, New Jersey