FORVM`s Classical Numismatics Discussion Board

Numismatic and History Discussions => Uncleaned Ancient Coin Discussion => Topic started by: Daniel J on May 27, 2020, 04:10:26 pm

Title: Bright blue green patina under Paraloid coating. Artificially coloured??
Post by: Daniel J on May 27, 2020, 04:10:26 pm
I started to clean this Paraloid coating off these coins with acetone and what I’m guessing is a fake patina has stayed on. I figured if it was a pigment fake patina the acetone would take it off too. Any chance it’s a real patina? Otherwise any thoughts on how I should keep cleaning them? If it’s worth it at all?
Title: Re: Bright blue green patina under Paraloid coating. Artificially coloured??
Post by: JBF on May 27, 2020, 11:07:49 pm
It is not the specific gun bluing coin I mentioned.

The coin is an ancient bronze, I would think that any color you get from ancient bronze sculpture or other object, you could get with a bronze coin.
So you might look at bronze objects with what their coloring is. 

Patina, I believe, is an oxidization that protects the object, whether it be silver or bronze, unlike rust which is an oxidization which damages and eventually destroys iron objects.
Title: Re: Bright blue green patina under Paraloid coating. Artificially coloured??
Post by: Daniel J on May 27, 2020, 11:58:58 pm
Hmm yeah is this what the blue gun does? Think I can get it back to a more normal looking patina?? It looks freakish !
Title: Re: Bright blue green patina under Paraloid coating. Artificially coloured??
Post by: Jay GT4 on May 28, 2020, 08:01:52 am
If acetone doesn't take it off I would think that's the real color.  I'd leave it alone.