The brass should be scoured with 400-600 grit paper first and then pickled with a 10% sulphuric acid solution. When dry wash the junk off with warm water and voila a beautiful bluegreen patina. Dont remove the crystaline junk that has formed, just pat it dry. I used a mixture of copper sulphate, copper nitrate, 50% household ammonia and water, sodium bicarbonate and let it sit for about a week, or until the liquid is mostly evaporated. If you want to blue patina gold, then you can use iodine and immerse the piece in it and use just like you would use jax (see my other comment on blackening silver) I really like those blue/green/turquoise hues! but I didn't use the salt (didn't know about that) I'll try it again. I tried the amonia and it didn't work as well. Me too! I used copper sulphate diluted in water and basically used it in the same manner which dandelionblue used with ammonia. I am saving all these ideas into a word document! They worth gold!! Thank you! Also, you can't wash off the salt or you lose the color, so it'll be crusty.Īlso, I've heard you can use gun-blue on brass, but I'm not sure exactly what color it turns, kind of a dark blue-black probably? Sounds pretty similar to the cat litter method, but with salt instead of litter. It's hard to get to work right though, and I've never tried it on brass. The fumes from the ammonia react with the salt and make a bright blue color. always worth sealing any coloured patina in, too with silver certainly it will darken over time to black (as well as rub clean in parts if it's worn a great deal)įor copper, you can try an ammonia/salt patina - Just cover the metal with salt and a little salt water, then put a dish of ammonia next to the metal, not on it. (off to haul kitty litter out of the garage- no cat but we still have a bag from our northern snow days) I think that might fall under the term "proprietary" or "top-secret" method/process :-) But that is gross.Ĭat pee is "magic" with copper, cat pooh- not so much. And, as a cat owner, you have had to experience that stinky ammonia-ful cat pee! So in all reality you should be able to get the same reaction just by sticking the metal in the dirty cat box for a while. Well, as far as I understand, it's actually the fumes from the reaction of the ammonia with the cat litter. :) Stupid me! So the litter absorbs the ammonia and keeps the enviroment dry but active for the process. Sorry, I misunderstood, I thought that the catshit itself has got some chemical properties to make the patina. But worth playing around with! And i don't know any ratios or anything, I honestly just experimented. I used it on a non wearable piece so I let it build up a lot. It can get crusty so I sprayed it with lacquer to keep the texture. I just took it out when I liked the color. then I put a piece of cleaned copper that I had sprayed a solution of salt water on (helps to attract the "blue") in and closed it up. I took a tupperware container put in about a 1/2 cup of litter (clay) and poured some ammonia over it. I really don't know if it works for brass, but it does work for copper. I will have to try that idea dandelionblu as I hate working with liver of sulpher!! Thanks!! Really? I am not short of cat litter, and I have a bottle of ammonia, so I'll go for it! Thanks the idea!Īnd can I tell it to the potential costumers that the ring stayed in a handful Worth a try, no?Ĭat litter and ammonia in a closed container. Have you ever tried "cat box" patina? I am not sure if it works on brass, but I got a gorgeous turquoise on copper. Thank you Caroline!! I started to collect your comments in a word doc, THEY WORTH GOLD! :) I like working with Liver of Sulphur a lot with sterling-it reacts to the copper within the sterling and makes a variety of colours (you must submerge the piece in the heated solution for a few seconds, then remove it and neutralize it with baking soda and then water many times before a blueish colour is achieved)-I suggest the same with brass as it has copper in it (usually 60 % or so), but I would think that the blue from Liver of Sulphur and brass would be quite dark-almost deep purpleish.Ĭaroline Bacher (a group admin) edited this topic ages ago.
PEE PATINA BRASS SKIN
Wear a respirator and work in a well-ventalated area with any patinas! I don't know how permanent this patina would be for jewellery or if it would be toxic to the skin if worn as a piece of jewellery. Heat the piece to be coloured, then brush or submerge it in the solution and rinse it in cold water.
This is a popular patina for bronze, so you could get it at a store/casting house that supplies materials for large castings. Perhaps try 1 tsp Cuperic Nitrate mixed with 6 ounces water for a sky blue colour.
PEE PATINA BRASS HOW TO
Does anybody know how to make blue patina on brass?
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