I finally got some Baldwin’s Patina to try on my pieces of mixed bronze and copper clay. I learned about it from Hadar’s blog, and was happy to see that Rio Grande carried it. It makes quite a difference. The copper turns to a rich color that contrasts better with the bronze. I wish it did not color the bronze at all, but it does, slightly.
The piece on the left has been oxidized with Baldwin’s Patina.
To try another patina, I took the untreated piece on the right and suspended it in a sealable container over a shallow layer of ammonia with a little vinegar added. I then sprinkled the piece with salt. I left it covered for about 6 hours. Love the color! There seemed to be no difference in how it colored the bronze or copper. I will definitely try this again, in a more controlled way. (I wonder if there could be any kind of “resist” used to control where the blue color goes.) I also applied Renaissance Wax to this to see if it affected the color. It didn’t seem to change it much. Below is the piece, with the Renaissance Wax applied.
Next, I took another piece and tried a mixture of oatmeal, cranberry, and chocolate, and applied heat for about 10 minutes.