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 Replies: 9 / Views: 1,239 |
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Valued Member
New Zealand
140 Posts |
Hi all see attached for grading. How do I clean without impacting surface?   |
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Moderator
 United States
56855 Posts |
100% pure acetone, not standard nail polish remover. John1  |
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Pillar of the Community
 United States
7955 Posts |
I would guess in the XF range, though I bet there will be some disagreement on this one.
There are a lot of contact marks in the fields, but I do not see wear that would knock it lower than this.
Please be very careful with attempts at cleaning. You have a very attractive coin there, and an errant attempt to remove some darkened areas can make it look a lot worse.
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Bedrock of the Community
United States
94367 Posts |
Guessing EF-45, possibly cleaned.  to the CCF! |
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Valued Member
 New Zealand
140 Posts |
First coin Ive started to clean 8-) well the acetone does everything and already has made a significant difference dissolving some of the gunk on it. I so want to take to it with a tooth brush but know you shouldnt.
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Bedrock of the Community
Australia
21788 Posts |
.250 fine silver, /750 copper.
After the blanks were punched out for these coins, they were dipped in acid, and copper was preferentially leached out of the surface to increase the purity of the silver in the surface, in a process known as 'blanching'; the blanks were then rinsed free of remaining acid before being struck.
During circulation, enriched silver was worn off the high points of the design showing up the poorer silver alloy underneath. The poorer metal is less resistant to tarnishing, and shows up as either blacker than the surrounding metal or more coppery in color.
The tarnishing cannot be removed by soaking in an acetone bath. Same applies for the dark toning that appears in the more protected parts of the coin, such as in the lettering. The black tends to be worn off the more exposed areas of the fields and raised areas during circulation.
Coins that have unworn high points with full silver are quite scarce and much more attractive in this series. EF coins with coppery high points much more common.
This coin EF.
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Pillar of the Community
United States
7955 Posts |
If the gunk contains any particulate matter, the toothbrush will drag this across the surface of the coin, abrading it. Not worth the risk if you like the coin to look as good as possible. I have seen some collectors here recommend very gentle and limited use of a cotton swab (which can still drag particles ... hence the "gentle"). Don't forget that if there is a bright shiny spot under the gunk, this is another type of non-uniformity in the appearance. SO be careful what you wish for  |
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Pillar of the Community
4628 Posts |
Don't clean it ever!
Gradingwise, all of you are too generous, this coin is VF to gVF. how do I know is because the middle diamond of King George's crown is barely visible and coin has overall light wear and only weak lustre.
Decent coin, cleaning with ruin it anc change it to VF details.
Good to see another Kiwi here!
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Bedrock of the Community
Australia
21788 Posts |
I can see 8 pearls, normally an indication of EF grade. Nevertheless, there is a tiny amount of wear on the diamond.
Localized toning of the exposed poorer metal makes the diamond hard to see.
I repeat comments of others: cleaning will not improve the appearance of this coin, an acetone soak will not be of much help.
Edited by sel_69l
06/01/2021 6:21 pm
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Bedrock of the Community
United States
36832 Posts |
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Replies: 9 / Views: 1,239 |
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Posted 05/29/2021 12:23 pm
