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Black Light Test Article
Old 07-09-2016, 11:19 AM   #1
Dietrich Maerz
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Default Black Light Test Article

I was asked to provide this article for the readership as a downloadable pdf. The article was published in No. 2, Volume 2 (Summer 2011) in the International Militaria Collector.
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File Type: pdf Black Light Article.pdf (1.11 MB, 891 views)
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Old 07-09-2016, 11:45 AM   #2
herrgeezer
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Dietrich, thank you for the link.
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Old 07-09-2016, 12:10 PM   #3
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Hi Dietrich thank you . Cliff
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Old 07-09-2016, 12:27 PM   #4
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Yes indeed, much obliged.

While nicely disproving the reliability of UV-glowing as a sign of post-war manufacture, the article doesn't specifically address the next obvious question, i.e. does UV-negativity have any role is supporting a claim of pre-1945 manufacture?

To answer that question, one needs to know post-1945 how widespread was the use of fluorescent whiteners in the industry for white fabric? If, as a theoretical example, all mass-produced white fabric produced 1950 to 1980 was processed with fluorescent whiteners, then a negative UV test would suggest the white cloth item was produced pre-1950 or post-1980.

But I suppose we don't really know exactly when the use of whiteners in white cloth manufacture really "took off", whether they were universally adopted and whether their use varied over time, so for now a negative UV-test is probably equally uninformative.

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Old 07-10-2016, 04:04 AM   #5
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Starch also causes a response to blacklight
I once had an original KC ribbon that did respond to blacklight, but it was 100 % authentic.
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Old 07-17-2016, 08:07 AM   #6
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Good to have a pinned thread. Here is another link.

http://www.wehrmacht-awards.com/foru...0&highlight=uv

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Old 07-17-2016, 12:45 PM   #7
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Another good link.

http://www.wehrmacht-awards.com/foru...d.php?t=109361
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Totenkopf authentic????
Old 08-12-2016, 10:21 PM   #8
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War Totenkopf authentic????

Looks like good stitching, skull is shaped oddly, same with jaw, does not show any UV effects... Peppered with shine on the skull, but not on the bullion wire.

https://www.instagram.com/p/BJCFZSUDuDy
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Old 08-13-2016, 12:17 AM   #9
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Quote:
Originally Posted by Step98 View Post
Looks like good stitching, skull is shaped oddly, same with jaw, does not show any UV effects... Peppered with shine on the skull, but not on the bullion wire.

https://www.instagram.com/p/BJCFZSUDuDy
bad

post it in the ss cloth section if you want more opinions
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Old 09-15-2016, 03:12 PM   #10
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If you once washed with modern soaps and powders. It became glow. Sometimes, rarely but it's hapend- old over 100 years old items is glow, even unwashed. Also the cat's urina is glowing too. If your cat made any stainings - it will glow.
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Old 09-27-2016, 09:12 AM   #11
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Colleague Dietrich thank you
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Old 01-08-2019, 04:50 AM   #12
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Article is correct based also in my knowledge and tests back in the 90's. Rock solid provenance LW insignias stock of ex tailor shop certiain white piped Material was also positive for UV light, same with certain modern washing chemicals.
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