Does anyone know a blue patina on copper that doesn't rub off?
I'll be your best friend.
As others have stated, all patinas will eventually wear off. Patinas
are just a layer - be it thick or thin - on the surface of the object
and thus subject to wear. It can be protected for an example with
laquer or wax, and this will postphone the wear or - if repeated -
I have with success used the following formula (taken from Richard
Hughes and Michael Rowe’s: The Colouring, Bronzing and Patination of
Ammonium Carbonate 300g Acetic acid (10 per cent) 35 ml Water 1
Add Ammonium Carbonate to the water, let dissolve and stirr in the
acid very gradually. Heat the solution to 30 - 40 degr. C. Apply the
solution to the piece gently and with a soft brush, then immediately
scratch brush it. Work on it for a short time and then apply more of
the solution. Remove “pools” of solution with a soft brush or by
blotting with soft material. Allow it to dry in air and wax finish
it. This has worked for me and is by far the simplest of the many
recipees in the book. Let’s hear, if it works for you.
I hope, I’ve gained a good friend here
Kind regards from autumnly Denmark, where wh have not yet had a night of
Niels L�vschal, Jyllinge, Denmark
phone (+45) 46 78 89 94