Question asked 2019-09-12 14:34:21 ...
Most recent comment 2019-09-12 15:13:16
I'm working on a mixed media metalpoint. I'm using gold, copper, brass, bronze, silver and bismuth nibs to represent the hues of an oriole I'm depicting. I do not want the base metals to tarnish; additionally, I'm framing the work without glazing. For both those reasons I'll be varnishing the piece, with either a very thinned layer of platina shellac (the benefits & drawbacks of which we've gone over on the forum, so I won't belabor that issue) or B-72 (I know, a better choice, but I don't like how "plasticy" it feels/looks), then following either isolating layer with an application of wax medium. Will this be sufficient to seal off the image and inhibit tarnishing?
Answers and Comments
Probably. On the other hand, I have seen plenty of Dutch
metal leaf and bronze powder painted decorations used in architectural interiors
that that have tarnished over time. I am not positive that they were initially
coated, so this may be a moot point.
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