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Author Topic: What is this copper plating technique in the video?  (Read 516 times)
cossoft
Gunner
**
United Kingdom United Kingdom


« on: July 13, 2017, 02:56:01 am »

Does anyone know what's going on @ 11:40 in this video (https://youtu.be/BCAiVm3GeYA?t=700) ?    It looks like a patina is being electro deposited.  But what's the solution and how much power is required to do this?  It's not urine is it?  Tony Robinson's always doing stuff like this with urine.   Do you plug it into the mains or will it run off a PP3?  And what are the electrodes made of?

I usually create this effect by washing in acrylic paint and wiping it off, just like the presenter.  It's not as effective as his method though...
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Synistor 303
Gunner
**
Australia Australia


Zenyna Ironbracker


« Reply #1 on: July 13, 2017, 03:42:48 am »

He has electroplated it with copper. (Not urine!) Just look up copper electroplating on Mr Google. He would have used a copper sulphate or similar solution in the form of a powder dissolved in water.
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cossoft
Gunner
**
United Kingdom United Kingdom


« Reply #2 on: July 13, 2017, 04:06:45 am »

But copper sulphate solution is dark blue...
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spunk
Officer
***
Netherlands Netherlands


« Reply #3 on: July 13, 2017, 07:15:20 pm »

 Why so difficult? I always use amoniak fumes.

 Using the fumes of household ammonia to oxidize copper is really quite easy and is an inexpensive way to oxidize copper and brass..
 Place your object on a grid in a container with a lid, Or hang it on the lid of a glass jar:

 At no time should the metal or finished product come in physical contact with the ammonia liquid; it is the fumes that will produce this patina

 ( It is a little smelly,)  Grin

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Steerpike
Officer
***
United Kingdom United Kingdom


« Reply #4 on: July 26, 2017, 10:46:35 am »

The mix is actually explained in the comments:
"The mixture consists of: 50 g of 30% vinegar, 20 g of salt and 50 g of water. I used a 5 volt and 2 amp power supply. Connect the positive terminal to the part, and the negative terminal is lowered into the water. Time of blackening of the metal somewhere in 10 minutes ... [the negative terminal is a] Small piece of stainless steel."
Seems like a neat and easy technique.
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Keith_Beef
Snr. Officer
****
France France


« Reply #5 on: July 30, 2017, 11:34:42 pm »

Hmmmm… That looks interesting. I sometimes use a chemical treatment to blacken brass furniture knobs and the like, and I might want to blacken a Sam Brown stud soon. So I wonder how hardwearing the process shown in the video is.
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--
Keith
cossoft
Gunner
**
United Kingdom United Kingdom


« Reply #6 on: August 05, 2017, 03:31:48 am »

Hmm. What could the black stuff actually be then?  Any chemists or mad professors here?
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river rat
Gunner
**
United States United States

Gambler. Grave Robber. All around fun guy.


« Reply #7 on: August 22, 2017, 01:54:50 am »

He says what was done in the comments below the vid.
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I'm not all bad. I rob graves. I don't add to their numbers.
von Corax
Squire of the Lambda Calculus
Moderator
Immortal
*
Canada Canada

Prof. Darwin Prætorius von Corax


« Reply #8 on: August 22, 2017, 05:25:06 pm »

Hmm. What could the black stuff actually be then?  Any chemists or mad professors here?
Just a guess, but it might be copper acetate.
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