Verdigris is ANY type of copper corrosion. I hate the term "bronze disease", it's not a disease, it's copper corrosion and, therefore, verdigris....
Massive would be the correct word. The handheld instruments are but toys. To make it simple to understand, the SEM has up to 120,000x mag and I...
The problem with using scientific method is that it is very expensive. I have a $250,000+ SEM-EDXRF in my lab but it's fairly time consuming to...
I can only speak for the Lincolns I've bought in ICG slabs...but the grading on those was spot-on!
Additionally, rather that use the vague terms AT/NT (which I can't stand), use either Market Acceptable or Not Market Acceptable. None of the...
63, nice coin.
Very nice! 65BN
Too bad it's not a CLAM!
65RD
Thanks for your service! Most mint packaging can be easily opened and other coins substituted. It doesn't matter to the graders, they don't see...
I suspect RCM uses vacuum to protect their own interests, it will buy enough time from packaging until the end-buyer receives the item. However,...
Numismatically the correct term is CENT! However, in practical terms nearly everyone on the planet calls them "pennies". They are even labeled...
You should NEVER use vacuum for coin storage! I know it seems like it makes sense on the surface but the logic is flawed. By creating a vacuum you...
The moisture is already there, it's part of nearly everything. You're breathing it in right now. It doesn't matter how well you have your coins...
That's how the mint labeled them in the rolls they sold. It's simply the order of release, i.e. Lincoln Penny 1, Lincoln Penny 2, etc.
pKb of KOH is about twice that of NaOH. Both are extremely strong bases, especially as the ionic strength increases. In my experience brief skin...
...and I just love this one:[ATTACH] [ATTACH]
Ag+ + Cl− → AgCl Cu^+2 + Cl-→ CuCl and CuCl^2
Looks like PVC damage, you removed the residue but the cupric chloride has formed and locked onto the surface. VC may remove the verdigris but the...
Insider, I will try to answer some your questions: It will evaporate (mostly) and potentially redeposit the very thing you were trying to...
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