I know some here will be into metalworking and such so thought i'd ask here first.
How do i go about getting copper to look like this?
Not the "patina" (I hate that word, so overused) but the "eaten" away edges. I'm assuming it'd be done with an acid of some sort but no amount of 'googling' helps.
I would suspect an acid spray on & wash off when the desired effect is just about done.
attitudedesignz,
Sep 25, 4:29am
Yep, but what acid is the thing i'm chasing.
brapbrap8,
Sep 25, 4:34am
Google reckons that Nitric acid is the only thing to dissolve copper.
skin1235,
Sep 25, 4:35am
sulphuric?, could try a strip and see what the time frame is doing it with electrolisis via copper-sulphate, reverse the polarity and send the copper to say a steel bolt? may need say a wax splatter to achieve the holes though
mrfxit,
Sep 25, 4:36am
D'OH yea sorry, speed reading again Nitric acid apparently or if you are really brave aqua regia
skin1235,
Sep 25, 4:36am
wondered about that as I typed in the above - although sulphuric and copper should create copper sulphate, hmmmm
I cant help you with that look, but I had to age some old copper quickly on a job for a client and they happened to live next to the sea. I dipped the nice shiny copper in the tide for a minute or two and within a few hours the colour changed to a deep red. Not the look I was after so I had to clean it up with steel wool and leave it outside for a couple of days to get the weathered look.
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