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How to blacken brass?


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#1 Double_Canister

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Posted 04 January 2019 - 04:33 PM

Anyone know a good and easy to blacken brass suspender hardware?



#2 Steve B.

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Posted 04 January 2019 - 05:01 PM

There is (was?) a model railroading product called Blacken It. It worked well, but I don’t know if it would be durable enough for susp3ner hardware.

Check with your local hobby shop.

#3 72psb

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Posted 04 January 2019 - 05:35 PM

Try "Birchwood Casey" Brass Black. Found in gun shops or on line.



#4 jeb137

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Posted 05 January 2019 - 06:48 AM

mnu1.jpg

 

It's the product we used to blacken boot eyelets, rank devices & belt buckles when I was in the Seabees.  

 

Jon B.

Newaygo MI

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#5 Bluehawk

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Posted 05 January 2019 - 09:10 AM

Question:

 

Do those commercial products smell of ammonia? 



#6 suwanneetrader

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Posted 05 January 2019 - 10:45 AM

When I used to relic hunt alot along Suwannee river I could buy a quart size container of yellow sulphur powder from an old time Druggest who still compounded Medicines (1970- -80) to put in my socks to keep red bugs (chiggers) out and if I recall it will tarnish silver. copper and brass.  I believe you dampen the powder pour it in a small hole around your item and keep moist for a few days or just make a paste and paint on the item.  Richard



#7 Steve B.

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Posted 05 January 2019 - 03:08 PM

M-Nu is basically a paint.  There are other products that will blacken brass through a chemical process.  The Blacken-It has a strong odor as I recall, but I don't recall if it was an ammonia odor.  A google search turned up other products, too.



#8 Double_Canister

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Posted 05 January 2019 - 04:10 PM

What would be the most durable method?



#9 Bluehawk

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Posted 05 January 2019 - 04:10 PM

It would be interesting to experiment with commercial products vs ammonia.

I understand, but have never tried, that it will blacken brass.



#10 themick

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Posted 05 January 2019 - 07:35 PM

Directly related to what suwanneetrader posted above, years ago I used "liver of sulfur"  which darkened brass/copper.  Here's a link to it:  https://en.wikipedia.org/wiki/Liver_of_sulfur  I remember buying it from a pharmacy around 40 years ago, but no doubt you can get it online now.  It works.  The Wikipedia article tells you how to use it.  As I remember though, it smells like old ripe farts!!

 

 

Steve


Edited by themick, 05 January 2019 - 07:37 PM.


#11 Keith

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Posted 22 May 2019 - 06:19 AM

Here is the cheapest and easiest way.  Get a plastic container you can seal.  Fix a wire hanging from the lid to suspend your brass item on, not touching anything.  Put a paper towel in the bottom and saturate it with household ammonia.  Close the container for a few hours and then check for color you want.  Most I have had to wait was overnight.  Usually a few hours will do the trick.  Naturally be sure your item is perfectly clean of any oil, finger prints etc. etc.  Good luck.



#12 917601

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Posted 22 May 2019 - 01:51 PM

Look up a cheap way, eggs, patina. I used it some time ago for a huge load of brass WW2 cartridges that I used phosphoric and citric acid to clean bright and shiney. To shiney, put it a plastic bag and eggs, took a few days to darken, patina was excellent......I also heard chicken [email protected] works well. Get back with us.

Edited by 917601, 22 May 2019 - 01:52 PM.


#13 Keith

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Posted 22 May 2019 - 05:46 PM

I just reread your original question and my answer probably is not what you are looking for.  The method I described, with the household ammonia, will put a patina on brass but, will not blacken it.  Regards.




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