how about a patina... do they come in reds, blues, etc??
Hi, Jim. Something in your post made me think this question is
directed towards me, even though I’m not a patina expert ;<} Lots of
people know lots more about patinas than I do, so feel free to jump
in there. But… “The Transition Metals” is what people call what
is essentially the center of the periodical chart. That is iron,
nickel, copper, titanium - I’m not going to look it up, but it’s
something like 60 metals/elements. One thing they have in common is
the property of forming colorful compounds, which is the reason why
fireworks and paint are what they are. Obviously, fireworks are
burning compounds, and paint is just the natural color of them.
So, that’s what patinas really are. Copper is associated with blue,
green and reds can be pulled out of it, too. Copper sulfate is, as
many know, the blue of peacock feathers. When you put patina
chemicals on metal, a reaction takes place that creates colored
compounds, and of course there’s art to it, too. The same basic
chemistry of transition metals colors too - chromium
being prominent in that.
So, the bottom line answer to your question is that most of the
silver compounds I know of are either white or black or black-ish,
plus they are easily soluble in water, which is a bad thing for a
patina to do. When you rust iron with oxygen, it is red. When you
"rust" copper you get green verdigris - the natural oxidation. When
you “rust” silver with sulfur you get black or black-ish. That’s
really it, but hopefully an understanding, not just an answer. In
order to do a true patina requires a reaction that creates colored
chemical compounds, and that just doesn’t happen with silver. Which
leaves applied finishes - paint, resin, enamel.