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Die Polish Lines On Aussie Coins

 
 
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Formerly nancyc
Australia
5009 Posts
 Posted 12/01/2018  4:57 pm Show Profile   Bookmark this topic Add Nevol to your friends list Get a Link to this Message
The following is an explanation of DPL's as opposed to Die Cracks written by another member.

Die cracks are not normally straight, although they can be, but thickness along the length will vary, whereas DPL are quite uniform, straight, and nearly always parallel.

Die cracks might have little cuds along the length or at the thickest end where they began, and as metal doesn't usually break in a straight line, they are usually uneven and a bit crooked or jagged.

A die crack will be visible on the surface of all parts of the coin including the devices, but DPL's will only show in the fields. So basically if the line is through any raised part of the coin, it's most likely a Die Crack, and if it's only visible on the flat field of the coin, it's most likely a DPL.

DPL's are caused by the Mint trying to polish out Die Clash Marks.


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Nancy
Edited by Nevol
12/01/2018 5:30 pm
Pillar of the Community
Australia
2399 Posts
 Posted 12/01/2018  7:14 pm  Show Profile   Bookmark this reply Add triggersmob to your friends list Get a Link to this Reply
Thanks for the info Nancy.

Steve
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Pillar of the Community
Australia
685 Posts
 Posted 12/01/2018  10:21 pm  Show Profile   Bookmark this reply Add nealeffendi to your friends list Get a Link to this Reply
Hi Nancy.
Couple of errors:
-Die polish lines are frequently curved due to being done by hand in a circular motion
-Die clash marks are rarely the reason to polish a die.
-Most die polishing happens on new dies as part of their manufacture, that is why they are most obvious on coins struck from fresh dies
Formerly nancyc
Australia
5009 Posts
 Posted 12/02/2018  6:16 pm  Show Profile   Bookmark this reply Add Nevol to your friends list Get a Link to this Reply
Oops, my bad. Thanks Neale.
A friend is a present you give to yourself.
Nancy
Valued Member
Australia
498 Posts
 Posted 12/02/2018  9:24 pm  Show Profile   Check ryurazu's eBay Listings Bookmark this reply Add ryurazu to your friends list Get a Link to this Reply
agree with Neal and thankyou for the info
Don't they also polish a dies for proof dies frequently like after couple of hundred strikes or when required.

they polish die just to remove fluff or other obstructions?
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