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Bronze patina urine12/3/2023 After a little research, I found out (that with different chemicals) you can get a rainbow of results. Originally, I thought you could only get it to come out green. I love the way copper looks with any kind of patina. When I built that pedestal, I wanted something a little different. Most of the time when I read your posts, I think, "how could one person have all of this stuff in their head. This response submitted by Kevin on 1/17/05 at 4:43 PM. You can buy acetic acid from photo shops in 28% solution which will do a much better job than vinegar.Ĭur. Vinegar is dilute acetic acid, around 7% in solution. The finish achieved with the vinegar and salt is just rapid corrosion. The cleaning process leaves a very pure metal surface which quickly corrodes when exposed to the water, oxygen, and carbon dioxide from the air. Hydrogen chloride is a strong acid and the combination of it and sodium acetate rapidly cleans the surface. Salt, or sodium chloride, combines with acetic acid from the vinegar to produce sodium acetate and hydrogen chloride. If you did not clean the surface after the oxide build up, the corrosion will likely continue. The surface rapidly oxidizes following the initial stage, and the color you have achieved is mostly carbonate and sulphate. Basically vinegar (acetic acid) and salt combine to make a cleaning solution for copper. I checked the photo and that green is not the patina that was requested. Salt and vinegar This response submitted by cur on 1/17/05 at 1:33 PM. I disolved as much salt as I could in a cup of vinegar. I'm not an expert on chemical reactions, but this method worked for me. This response submitted by Kevin on 1/17/05 at 8:52 AM. If you had been sober during the exercise, you would have noticed the dumpster was already painted GREEN! Of course, you are confusing peeing on a Dumpster at midnight with true patinas. The problem with that is the patina imparted by soaking bronze in vats filled with cow urine and sawdust is a rich brown, and not the green the poster requested. Of course cow urine is used for the purpose, and the break-down (ammonia cycle) seals and purifies the stain. ( ) 4.252.241.242Īlex, that may have been a left-handed joke, but uric acid is used to impart patinas on bronze, copper and brass. Urec Acid This response submitted by cur on 1/16/05 at 10:41 PM. Just pee on it and leave outside 24 hrs, presto! ![]() Many of us have done so much, with so little, for so long, that we can now do everything with nothing.Glad I could help.įaster patina This response submitted by Alex on 1/16/05 at 8:24 PM. That is because This response submitted by cur on 1/16/05 at 7:26 PM. The plethora of knowlege that can be found here will never cease to amaze me. Thanks cur This response submitted by G-man on 1/16/05 at 7:20 PM. Rinse HCL off with distilled water and sponge it up. Use HCL in 10-20% solution to clean and etch all CU3 from the copper before applying patina. Muratic acid will clean it.LOL, as if you didn't already find that out. Here ya go This response submitted by cur on 1/16/05 at 7:07 PM. Use HCL in 1-20% solution to clean and etch all CU3 from the copper before applying patina. You can also dilute the mixture with water to achieve pale greens and deepen by adding additional coats. You can apply with a brush to achieve a more uniform effect. 'At's what I use for deep green patina on copper. Warm the copper base and the mixture to about 180Fįor color variation, place in boiling water after drying. Here ya go This response submitted by cur on 1/16/05 at 7:04 PM. ![]() Return to The Taxidermy Industry Category Menu I did a copper sculpture for a fish base and want to patina the copper to get the green look,verdegris I think its called.I tried muriatic acid and it did nothing (20%) Do I need hydrochloric or sulfuric? (I know muriatic is diluted hydrochloric hence the 20%)or is there something else?Thanks for any suggestions. How to patina copper? How to patina copper? Submitted by G-man on 1/16/05 at 3:43 PM.
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