Friday, June 23, 2017

Beacon Hill Tower Roof (Step 5) Aging the Copper Panels

Before applying the aging mix, the copper was cleaned with a window cleaner containing ammonia. The half-and-half salt and white distilled vinegar mix was painted on the copper panels, taking care not to let is drip. The salt did not dissolve, as is evident in the photo. The salt grains will turn greenish blue to become the smoke-and-mirrors iteration of verdigris.  (Click photos for larger image.)

On line discussion indicates that humidity will enhance the aging process, to the tower roof has been tented, taking care not to let the plastic touch the copper areas.

Coming soon, the Great Reveal! ♫♪♬

Thursday, June 22, 2017

Beacon Hill Tower Roof (Step 4) Installation of Copper Panels

The copper panels are glued in place. The photos show the sequence. The panels are paper backed. I dotted Aileen's Tacky Glue on the roof and pressed the panel in place with a pad of toweling, my fingers and a burnisher (seen at right).

The trickiest panel was the front, as it had to be gently worked behind the window sill.  I don't think I mentioned earlier that these adhesive-backed copper sheets are made for copper foil stained glass projects.They are a sturdy 1.25 mil thickness able to take the rubbing and pressing. If it were any thinner, I'm afraid there would be danger of tearing.

I placed the tower roof on the house to dry overnight. I'm planning to use the salt/vinegar aging mix and will tent it with a plastic bag, so I want to be sure the glue is dry or at least well set before subjecting it to the humidity. 

The shiny copper is a bold presence. The lighting was not the best for the photo, but you can get an idea of how it will work with the green shingles on the lower mansard roof bits when it takes on its own veil of green. 

Beacon Hill Tower Roof (Step 3-a) More Verdigris Testing

Several days have passed since the first salt/vinegar test patch was made. I wasn't too excited about it at first, but as it has developed, I'm liking it more and more. The undissolved grains of salt have formed some nice bits of verdigris, and the background, which I first judged as being too pinkish, has deepened in color.

The bit on the left is the salt/vinegar test. The darker sample on the right is the result of a test with bleach. The bleach aged the copper to the dullish brown found on naturally aged copper but did not produce any verdigris. I'm sharing it here in the spirit of science.

For comparison, here is a photo of the salt/vinegar mix after about one day. Notice how the background has darkened and the patches of verdigris have developed.

I am leaning toward the salt/vinegar mix. I'm going to glue the panels in place on the tower roof while I think about it.