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Pillar of the Community
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Australia
541 Posts
 Posted 05/17/2012  09:29 am  Show Profile   Bookmark this reply Add wwwww to your friends list Get a Link to this Reply

Quote:
No my point wasn't about chemical damage and PVC damage.

Most of the toning I have sen on early 70s mint sets is due to the coins being handled. Copper and Silver coins are especially susceptible to toning due to being handled too much. Humidity and pollutants in the air can also tone coins. None of these things would affect the grade (or wear) on the coin.


The loss of lustre on those early 70s mint sets is usually due to PVC exposure, yes toning can be caused by humidity, sweat from handling, etc as you say but how is that relevant to anything we're discussing? Nobody said toning affects the grading.
Pillar of the Community
wwwww's Avatar
Australia
541 Posts
 Posted 05/17/2012  09:44 am  Show Profile   Bookmark this reply Add wwwww to your friends list Get a Link to this Reply
I think I understand your confusion, you're mixing up the terms lustre and brilliance.

Mint bloom/Lustre is the natural reflectivity of a coin (usually cartwheel or mirror)
Brilliance is the natural colour of a coin (i.e. red copper, white silver, etc)
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