Posted 06/03/2014 7:03 pm
"Toning", on whatever metal, is just a very thin layer of corrosion. It is difficult to form such a layer on iron because iron oxide does not form a preventive barrier to further oxidation from forming - it tends to grow and keep on growing.
That being said, I have some iron coins with a very faint, even, pale blue-brown rust layer that could easily be called "toning".
That being said, I have some iron coins with a very faint, even, pale blue-brown rust layer that could easily be called "toning".
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
