• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Archived

This topic is now archived and is closed to further replies.

UNC Jefferson nickels, MS70 and toning

Started by e1cnr,

1 post in this topic

e1cnr

e1cnr

Posted
Posted

I was wondering if you could offer an opinion or offer other insight into my head scratcher

 

 

I have some nice uncirculated Jefferson nickels both the nickel/copper and the silver/manganese/copper versions

 

I have used the product MS70 on a few of these and noticed that occasionally the toning disappears - but not always

 

the MS70 is claimed to not be an acid or react with any metal -

my understanding is that it is a strong base (NaOH) with a detergent

 

so what happens to the color sometimes? I am pretty sure these are naturally toned coins -

 

Do you have any suggestions on the use of this product? a 1:10 dilution in distilled water? short contact time? neutralization after exposure?

Link to comment
Share on other sites
Go to topic listing