You all know by now, that I am developing a bit of an obsession with copper.
I think it is a natural progression to want to start playing with the effects that copper can give - particularly the 'patina'.
Actually, the meaning of 'patina' is really something that results from usage or corrosion over time, usually a greenish layer (basic copper sulphate) that forms on copper or bronze. So, technically, some of the patinas I am about to show you are more of a chemical reaction than a patina ... but none the less, they look great ... so please come and take a look.
Copper dipped in vinegar, sprinkled with course salt and sat on a bed of paper towel wet with cloudy ammonia. Left, covered, for 24 hours.
As above, (no vinegar) but suspended in a coffee can on a wire above a 1/4 cup of liquid ammonia - result shown after 24 hours.
As above, after 48 hours.
Colored effect after heating with a soft torch. Do a section at a time. When you see the color emerge, dip it in cold water and then move on to another section until you get the result you want.
The copper was covered with flux on both sides and then heated to a dark red glow on each side.
Immerse in water and repeat. The photo shows the result after two coatings.
The reverse side. I may have over heated this piece as I do not think it is really meant to go as black as this.
The copper was coated with a thin smear of Gilder's Paste, Patina.
Color using Liver of Sulphur.
Top row: L- rich brown, R- some "oil" type effect.
Bottom row: L- Dark grey, almost black. R- Dark coloration left in an imprint after removing some patina with fine steel wool.
As you can see, I have had a bit of fun with this. If you try it yourself, just make sure the lids on those containers seal well ... the ammonia is very strong .... have good ventilation or go outside when opening the container/tin.
As you can see the patina effect on the first 6 photos is a little crusty ... I will need to lightly brush it off a little more and then seal it with a spray for it to be usable in jewellery
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See also Patina Experiments no. 2 for a different batch of patina colours .
See also Patina Experiments no. 2 for a different batch of patina colours .
That's it for today, folks,
have a good day,
Jenni
