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Question asked 2019-09-12 14:34:21 ...
Most recent comment 2019-09-12 15:13:16
Varnishes
Drawing Materials
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?
Thanks,
Koo Schadler
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Moderator Answer
(brian baade)
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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