Did you clean the copper wire? Most wire is coated with a varnish or
shellac. To the salt, I would add vinegar or better (to me) ammonia.
The patina starts fastest if the wetted metal is exposed to the air
verses buries in the mix. Takes a couple of minutes (light patina)
to a day. Reapply if more color is needed.
-alma mentioned how her flux for lead-based solder created a
blue-green patina. how long does it take for the patina to
develop? i have treated some copper wire to the flux with zinc
chloride, but see just a hint of cloudiness on the wire. do i need
to be patient? do i need multiple applications? is the heat of the
torch necessary to see a rapid development?
The torch heat most likely burned off any coating. This takes time
and a bit of moisture. Heat tends not to speed this up.
-i have looked in tim mccreight's complete metalsmith for patina
recipes. the green patina refers to ammonium chloride and says another
name for it is sal ammoniac. where should i look for this ingredient?
i have never purchased anything from a chemical supply place and hope
that sal ammoniac is something common that i can buy somewhere else.
Chemical place as far as I know.
i looked at the brain press page on ganoksin.com and found his
book "patinas for small studios." it sounds like just the thing i
need. the emphasis is upon common, safe ingredients....
thank you in advance for any advice you can give me. i should say
that i took one year of chemistry about 36 years ago. you get the
Jean Adkins columbus, ohio
From the Orchid list: One of my favorite patinas is blue on brass.
Put a little ammonia in the bottom of a plastic container and suspend
the brass piece inside, cover and wait until the patina develops. You
can also add a little table salt for a slightly different effect. -
Try going to http://www.artmetal.com/ the into the sculpture area
(also try the jewelry area) and do a search for patinas. If you
still need more info, post to a Tech Talk area or sign up and post to
Get “The Coloring, Bronzing and Patination of Metals” by Richard
Hughes and Michael Rowe. Great book.
Hope this helps.
MidLife Crisis Enterprises
Cynthia Thomas Designs
Cynthia’s sculptures are at: http://www.mlce.net