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Natural Patina Chemicals?



 
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Kennyg2019
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Joined: 15 Jan 2022
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Location: NY

PostPosted: Fri Apr 21, 2023 4:06 pm    Post subject: Natural Patina Chemicals? Reply with quote

Hi,

I'm interested in learning natural patina chemicals/tecniques for forcing patina on raw brass.

I read about oak leaves but can't find any instructions (or videos) online.

Can anyone help me?

Otherwise, has anyone patinaed a brass instrument with boiled eggs?

Or perhaps (apple cider) vinegar?

What was your technique?

Can you post a video link?

Thanks,

Ken

P.S. I should say, I'm interested in obtaining a natural-looking patina...only without the wait!
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dmh737
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PostPosted: Sun Apr 23, 2023 2:58 pm    Post subject: Reply with quote

No video or even pics. But I patina’d a brass mouthpiece body as follows:


Pour ammonia onto paper towels.
Sprinkle salt onto saturated towels.
Place brass piece onto paper towels.
Pour ammonia on 2nd set of paper towels.
Sprinkle with salt.
Place salt side down onto brass piece.
Cover for 2-12 hours checking periodically for desired patina.
Rinse with water and towel dry.
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Kennyg2019
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Location: NY

PostPosted: Sun Apr 23, 2023 3:19 pm    Post subject: Reply with quote

Can you describe the results…color etc?
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Rogerrr
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PostPosted: Sun Apr 23, 2023 5:49 pm    Post subject: Reply with quote

I’ve done the ammonia and salt trick on copper and brass numerous times….you get a really cool blue-green color…. But in my experience it flakes/rubs off very easily….maybe there’s a way to protect it…and maybe it’ll stay in a few places

Try it out on pennies or something else first
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Kennyg2019
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Location: NY

PostPosted: Sun Apr 23, 2023 6:01 pm    Post subject: Reply with quote

I’m actually interested in a brown patina, but thanks.

I read that Renaissance Wax is a good sealer:

https://a.co/d/4qqm0Kb
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dstpt
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PostPosted: Sun Apr 23, 2023 6:07 pm    Post subject: Reply with quote

...

Last edited by dstpt on Mon Apr 24, 2023 6:37 am; edited 1 time in total
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Kennyg2019
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Posts: 261
Location: NY

PostPosted: Sun Apr 23, 2023 6:19 pm    Post subject: Reply with quote

Thanks for the suggestion. I actually saw most of those.
The most common “natural” agents are fumes from vinegar (with or without salt) or boiled eggs.
I ordered a few small pieces of raw brass that I will experiment on with various patina agents to see what gives me the even, brown color I’m looking for.
Hopefully I can post pictures somewhere and provide a link when I’m done.
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