VC is effective on ALL metals, regardless of composition.
Maybe, it's hard to tell from just a couple pictures. Like any conservation project, the results vary depending on many different factors. The bad...
To the OP, verdigris is NOT a disease. It is simply corrosion.
ANY copper corrosion can be correctly classified as verdigris since it really is a generic term. Many compounds form cupric salts, i.e. hydroxide,...
Because it would come back in a details slab.....and probably already did and was cracked.
Have you actually tried this on copper?
Verdigris salts (regardless of the type) are INSOLUBLE in organic media. Using Vaseline would be an exercise in futility. Not sure how you came up...
I instructed ALL family members many years ago to NEVER buy anything coin related for me. Amazingly, they all listened.
Appears to be a scarce PL cent (proof-like). I have a few modern Zincolns that look like proofs. Other than that, based on the weight and...
Definitely RB on this coin.
I know the solution! Let's start faking all the rare Chinese coins and sell them to their collectors!
The Donald said he'd put stiff tariffs on all their goods. Us consumers would complain but, if the tariffs are high enough, it would likely move a...
Fakes are EVERYWHERE! http://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20150929091755&SearchText=1909+s+penny
1) Poorly mixed planchet alloy, known as a "woody". 3) Die CRACK, due to over-use of the working die. 3) Looks more like stains than "carbon...
Just a plating issue, probably exposed to something acidic. PMD
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