Monday, February 21, 2011
Here, I'm using a brush to put on flake white - actually I used some Cremitz white here - that's been thinned with mineral spirits or turps. I started with the brush to get the stuff on there, then I smoothed it out with my thumb.
This abrading, done in small circles with dry sand paper and quite abit of pressure, is what allow the paint to bond with the copper. I think an ion is exchanged between oil paint and the metal, but don't know the science exactly - only that it works!
Then I clean off any red dust that is left behind, again with the alcohol. Now it's ready to accept the ground of thinned flake white.
I love painting on copper! But as with most painting supports - linen, panel, canvas or wall, there is much work that must be done before I can even think about painting on it.
Here is a 12 x 12 18 gauge copper panel. Paint will not adhere to the surface as it is and MUST be thoroughly cleaned and abraded .
Blue oil on linen panel 13 x 15
My intention here is to study the color blue. However instead of painting blue spheres like I did for 5 YR, I decided to try this blue pitcher that's pretty close to 6.5PB and Nasteriums from last summer's window box...for a touch of humor I added a small iron bird wondering about that reflection that leads outside! I started this one with local color on linen panel and have started another using a neutral grisaille but on copper. I'll post the way I prep the copper in the next post.