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White Paper Test

Posted: Fri Jan 04, 2019 3:04 am
by messydesk
@CascadeChris mentinoed the "white paper" test for uncirculated vs. AU coins, and I said I'd post some pictures. This test is one way of spotting a light break in the luster that might get a coin called AU58 rather than MS-something. Hold a coin on edge on a white piece of paper with some overhead light and look down at the coin so you see the reflection of the paper. On a coin with unbroken luster, you'll just see a plain, white reflection.
whitepaper-bu.jpg
whitepaper-bu.jpg (151.82 KiB) Viewed 2266 times
If you see a gray spot, which typically shows up on the tip of the bust first, then that is a sign of a luster break. AU coins that are not toned and not cleaned will almost always show this, and this is almost always a sign of an AU coin. It could also be a little dirt, but that's what a closer look will determine.
whitepaper-au.jpg
whitepaper-au.jpg (161.66 KiB) Viewed 2266 times

Re: White Paper Test

Posted: Fri Jan 04, 2019 3:12 am
by CascadeChris
Nice. Thanks for posting pics JB. Straight out of the ANA SUMMER SEMINAR Morgan class ;)

Re: White Paper Test

Posted: Fri Jan 04, 2019 4:05 am
by Pittstate03
Thank you for the visual!

Re: White Paper Test

Posted: Fri Jan 04, 2019 4:37 am
by Tekkie1
Excellent information!!
Thank you both.

Re: White Paper Test

Posted: Fri Jan 04, 2019 4:39 am
by CascadeChris
Everyone I show this to think I'm a freaking magician... and not just newbies. I'm talking experienced dealers too. Heck, even a friend that was a PC grader at the beginning in the 80s was wowed by it..

Re: White Paper Test

Posted: Fri Jan 04, 2019 6:13 am
by messydesk
I can't for the life of me remember where I picked this up or figured it out, although it was on Walking Liberty halves. An AU58 will have a gray, vertical stripe from head to toe. Sticks out like a sore, but well-struck, thumb.

Re: White Paper Test

Posted: Fri Jan 04, 2019 1:16 pm
by Kissov
Many thanks!

Re: White Paper Test

Posted: Fri Jan 04, 2019 2:07 pm
by ChiefRet.
Thanks John; Great information for the tool box.
Does this work on soft struck coins also?

Re: White Paper Test

Posted: Fri Jan 04, 2019 2:31 pm
by messydesk
ChiefRet. wrote:
Fri Jan 04, 2019 2:07 pm
Thanks John; Great information for the tool box.
Does this work on soft struck coins also?
Yes.

Re: White Paper Test

Posted: Fri Jan 04, 2019 8:24 pm
by HawkeEye
Nice tip, have fun in Florida

Re: White Paper Test

Posted: Fri Jan 04, 2019 9:13 pm
by Raybob15239
This is very helpful! I can't wait to go home and try this!

Thank you, John!

Re: White Paper Test

Posted: Fri Jan 04, 2019 9:29 pm
by shortnock
Great information, thanks.

Re: White Paper Test

Posted: Fri Jan 04, 2019 11:52 pm
by iwillbenice
I do not see it and sorry.I LOVE the topic but i do not agree.

Re: White Paper Test

Posted: Sat Jan 05, 2019 3:42 am
by playtime1
Neat trick. I just tried it on my AU coin, and as per Professor Baumgart's theory, a gray shadow appears near the tip of the
bust point at the neck. I like it !! Actually, I suppose I should have hoped that it didn't show, then it would have been MS.

Re: White Paper Test

Posted: Sun Jan 06, 2019 12:55 am
by alefzero
One would think this might become a bit difficult with coins exhibiting even a mild amount of toning. Have not tested that, but I guess a dead spot in the lustre is still just that and might be discernable.

Re: White Paper Test

Posted: Sun Jan 06, 2019 1:38 am
by UncleGildy
Thanks!
Explains my '78 VAM221-2 coming back AU from that bulk submission. I swore it was MS something before sending it in. The test would have kept me from getting my hopes up. Next time...