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Post by Deleted on Sept 16, 2009 13:33:26 GMT
Hi guys....
I read on one of these forums that lime sulphur would blacken brass copper and silver and metal...
I tried it on brass, and it's not blackening, I tried to heat up the brass and it didn't work, so I tried to heat up the lime sulphur and it didn't work...
So I'm wondering what the deal is.
Any help would be greatly received.
best, ADam
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Post by brotherbanzai on Sept 16, 2009 22:05:03 GMT
You might be thinking of liver of sulphur as a darkener, also called sulfurated potash. Go here www.artchemicals.com/Antiquing_Solutions_s/166.htm for premixed patina chemicals to turn brass/bronze brown or black. I've heard that you can use perma-blue to darken brass as well.
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Post by Deleted on Sept 17, 2009 3:49:05 GMT
No no, liver of sulphur works. I'm not mixing the two up. I hear that you can use lime sulphur as well.. All over the net, people say things like this.
So I picked up some lime sulphur because it was available on ebay, and shipped to Singapore. I tried it, and it didn't work.
Any ideas why, for the people who've used lime sulphur for darkening.
Thanks for chiming in though!
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Post by Deleted on Sept 17, 2009 6:16:39 GMT
Liver of sulphur doesn't work for me, I've tried it on seppas. Reacts only with copper and silver leaving a metal grey finish.
The stuff you patinate/ oxidize must be very clean. Try cleaning it by putting it in mild acid for a while, like strong vinegar 30-40%. Then rinse thoroughly with cold water and into the oxydation bath. If it doesn't work then, the compound of the brass is unstainable and must be copper plated first. Sometimes brass is laquered, and has to be sanded down.
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Post by Deleted on Sept 17, 2009 14:22:10 GMT
I sanded the heck out of the habaki before putting it in... No luck. I sanded the heck out of the seppa before putting them in, also no luck.
I think I'll just paint them and then lacquer them.
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Post by Deleted on Sept 17, 2009 19:44:19 GMT
If you are trying to achieve a matte black finish on them, consider painting them with high temp BBQ grill paint.
Heat the part first, spray paint with the grill paint, then bake for say an hour to cure the paint.
I have used it on firearm parts before and it is actually pretty durable. I sandblasted the parts first before doing the above, but with a freshly sanded finish on the parts, there should be plenty of tooth for the paint to adhere well.
Chuck
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Post by tajima on Sept 17, 2009 21:04:44 GMT
You had to ship it? We have it in the hardware store. Strange.
Thanks, -Tajima
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Post by Deleted on Sept 18, 2009 7:16:08 GMT
I live in Singapore. They don't have anything good here. I have to ship everything in.
chuckinohio - I'll look for some high temp paint... You're saying that'll stick and last longer then a regular metal paint?
Best, ADam
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Post by Brendan Olszowy on Sept 18, 2009 7:48:28 GMT
I believe exposing the brass to amonia vapours in a confined space is the home remedy.
I use perma blue, and G96 gun blue paste, and they black the brass nicely.
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Post by Deleted on Sept 19, 2009 9:30:11 GMT
amonia vapours.. hmm.. So I should go to a local salon and pickup some hair dye?
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Post by Brendan Olszowy on Sept 19, 2009 10:24:48 GMT
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Post by sicheah on Sept 20, 2009 4:47:39 GMT
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Post by Deleted on Sept 20, 2009 18:59:24 GMT
Yeah I googled to death... And ended up first buying sulphur flakes as I read that works, but didn't read the part where you have to turn it into liver of sulphur with your advanced chemist kit Then read somewhere that you can use lime sulphur, so I picked some up on ebay, and didn't work! So figured I'd turn to the forums for advice.. Thanks guys, will look into the ammonia thing.. Oh and btw Singaporeans very rarely take on DIY projects... Nobody I know or there uncle has powertools, and I know a lot of people. I'm sure that'll all help.. I'm going to the USA next month, so I'll order some stuff to my dads and experiment. Thanks again guys! Adam P.S. will try to get my ammonia from a local salon..
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Post by Deleted on Sept 20, 2009 21:43:53 GMT
I'm so glad this post went up. I had been looking for a way to blacken my habaki and seppa that would last through being touched and goin in and out of the saya.
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Post by Deleted on Sept 21, 2009 20:43:43 GMT
I found brake fluid to age brass nicely...by accident. I was trying to remove paint from brass and I heard a mechanic say that brake fluids are the world´s best paint remover so I tried it...found out that it also ages brass....
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Post by Deleted on Sept 21, 2009 21:09:40 GMT
Interesting! Do you have any pics of the antiqued brass parts? I copper plate and use liver of sulphur to blacken, then brush it to an antique old gold finish. But that is a very tedious process.
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Post by Deleted on Sept 22, 2009 4:07:07 GMT
Cold-- Brake fluid you say? Sounds interesting. Thanks for the tip.
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Post by Deleted on Sept 22, 2009 9:02:13 GMT
Cold Napalm - Brake Fluid, are you kidding me, you're messing with me right? I'm about to go downstairs and pull the breakline out and dance around in it with my brass pieces.. So I really hope you're not messing with me.
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Post by sicheah on Sept 26, 2009 21:00:30 GMT
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