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Does Non-Etching Tarnish Affect The Grade Of DCAM Lhcs?

 
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Author Previous TopicReplies: 4 / Views: 419Next Topic  
Pillar of the Community
United States
2924 Posts
 Posted 10/19/2020  3:42 pm Show Profile   Bookmark this topic Add mdpmedia to your friends list Get a Link to this Message
The subject line says it all but is this rule likewise applicable to non-proof LHCs as well?
Bedrock of the Community
Australia
17575 Posts
 Posted 10/19/2020  7:39 pm  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
All tarnish patination and toning are forms of surface corrosion. That applies to all metallic surfaces, not just coins, for example, silver tableware.

Third party coin graders usually see attractive toning or patination as helpful to eye appeal, an as such, does not normally affect the grade.

Tarnishing is a term which suggests
that the effect negatively affects the eye appeal, and if severe enough, negatively affects the grade as well.

More deleterious forms of surface corrosion can, and do, affect the grade. It is all a matter of severity.
Pillar of the Community
United States
2924 Posts
 Posted 10/19/2020  8:15 pm  Show Profile   Bookmark this reply Add mdpmedia to your friends list Get a Link to this Reply
How would one differentiate severe/deep toning from a very similar looking dark tarnish which allegedly would have a stronger effect on a high-end proof grade if I understand it correctly?

Secondly, if toning is mild enough (without corrosion), are there documented cases of some proof coins having still received an MS 70 designation?
Bedrock of the Community
United States
16683 Posts
 Posted 10/20/2020  7:02 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
Tarnish, toning, verdigris, patination, etc. are all forms of corrosion as sel said and I agree with him.

Obviously, the deeper form of corrosion (verdigris) will affect the grade (or cause a no grade) but toning is subjective. It breaks down to eye appeal for a grader. I have seen both sides, Lincolns I would have graded 64 but resided in a 66 slab and 66's in 64 slabs. When you're not sure, just use your eyes, a coin is either attractive or not. If you don't think it's pretty, a grader probably won't either.
Lincoln Cent Lover!
Edited by BadThad
10/20/2020 7:02 pm
Bedrock of the Community
Australia
17575 Posts
 Posted 10/20/2020  7:20 pm  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
Toning can enhance eye appeal.
Very light toning ,if it is blotchy an uneven, can detract from eye appeal. Beauty is subjective, and is in the eye of the beholder.
In almost all cases, light toning will not affect the grading, but it could negatively affect the value, especially if the toning is blotchy.

With very high MS grade silver coins, I prefer blast white, because that is the closest condition to which the coin first left the coining press.
Nice rainbow toning or blast white, such coins deserve preservation in airtight containers. In fact, lots of mint product collector coins are sold pre packaged in this way.
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