How to remove crud?

Almost forgot, when and if you purchase the DANSCO album 7000, make sure you also purchase the protective slip cover.

 

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The after shows loss of luster to me. A flat appearance in my estimation.

 

Acetone is a solvent and removes many organic materials. It does not react, remove, or alter any surface metal or toning. Luster is due to microscope flow lines. Since the flow lines are surface metal, they won't be affected by acetone.

Hope this clarifies things.

 

Thanks

 

Ditto

 

I tried some olive oil on one. Just dabbed it on a coin with a q-tip. The

I bought a $10 album on feebay. These were in it.

I did dab some olive oil on one. Luster appearance improved but some color diminished a bit.
https://youtube.com/shorts/hkWwCh2Am40?feature=share

 

WOW, WENT DOWN THE RABBIT HOLE ON THAT ONE..BEEN PERUSING THEIR ERRORS AND ARTICLES...THANKS FOR SHARING!

 

That's the way to go. Glad you noticed the other great information provided.

 

couple of terminally toned Lincolns.




The 79' spent a good year and a half in the green house.

 

uh...nowhere on that site does it say acetone removes luster...IT DOESN'T

 

Olive oil is a tried and true "cleaning" agent often used for ancient coins to remove crud from the ages. The consensus of opinion is that it removes real crud, but also darkens the coin. What you have on your coins is natural toning. Copper (bronze, brass, etc) coins start off as "red" and progress through red-brown to brown. The only way to escape this is to protect the coins from air and light.

 

I would like for someone to investigate the use of mild reducing agents such as sodium sulfite as a copper coin brightener.

 

@desertgem

 

Like flux? @Kentucky

 

Perhaps, sodium sulfite is a mild reducing agent which will oxidize from sodium sulfite to sodium sulfate while the copper oxide reduces to copper...

 

10 seconds in acetone won't do anything. Acetone can't dissolve contaminants that are underneath grime. Soak in distilled water first to loosen and remove grime. Then acetone to remove underlying organic contaminants. Let it soak for at least 10 minutes or so. Longer is fine as long as the acetone is sealed so it can't evaporate.

 

Pickin and Grinin, posted:"No where in that article does it say acetone removes luster. Acetone is mostly virtually harmless to a copper coin, and absolutely harmless to nickel clad, silver, and gold."

Actually, the unknow author of the article DID imply that acetone removes "Mint Luster." Of course this is not true.

 

I guess I still am missing

I guess I still am missing that part. What I did read implied that finger nail polish remover is acetone based, but has other ingredients that may harm the coin.

 

Correct. The article never says or implies that acetone removes mint luster. What the author did say is "As you can see in the photos, the cleaned coin has lost all mint luster and is discolored", but there is no indication, implied or otherwise, on how that example was cleaned. It looks to me like vinegar was used.