Discussion - Member to Member Sales - Research Center
Discussion - Member to Member Sales - Research Center
Playing around on the Internet I found the following information that book collectors use to detect and display antique watermarks in books.
There is a Dylux 503 Instant Proof Paper that is required.
The process involves placing the watermarked paper and the Dylux 503 in close contact and exposing the sheets to visible fluorescent light for one to five minutes. Since the watermark creates a thinness in the paper, the visible light passes through this thinness with greater intensity and thus nullifies the yellow dye coating on the Dylux 503 sheet. Following exposure, the sheets are separated and the exposed Dylux is passed under a long wave ultraviolet light. This irradiation causes the unaffected coating to turn a bright blue, and the watermark emerges as a white image. The costs of this process is about 7 cents per copy.
So now, this might or might not be a way for stamp collectors who seem to have trouble with watermarks. Some U. S. Stamp Collectors seem to think that Single Line Watermarks are difficult to detect. They are a challenge, but with a little bit of work, my results seem to work for me. Usually just changing the angle of your light works for me on Single Line Watermarks.
Do not know if this Dylux method is of use or not, thought I'd pass it on to all members of StampoRama.
If any of you try it out, let us all know what success or failure you have experienced!
DAVID THOMPSON
MSGT/USAF/RETIRED
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Sounds interesting and inexpensive.
Bruce
After posting the above I found this article:
http://www.gravell.org/wizard.php%3F%26%26offset%3D%26rectotal%3D%26query%3D
Here is an excerpt:
"Gravell was drawn into the world of watermarks in 1970 because of his extensive stamp collection. He owned several German "inflation stamps" from the 1930s and he wanted to copy their watermarks. Verifying the watermarks would increase the value of the stamps. The stamps, however, were on letters. "That made them more valuable," says Gravell, "but it also seemed to make it impossible to get a copy of the watermark."
In the midst of this quandary, he learned about "Dylux" 503 photosensitive paper, a proofing product DuPont had just introduced to the printing industry. In its broadest graphic arts application, a film negative of the material to be proofed is laid over "Dylux" paper and exposed to ultraviolet light. This produces a chemical reaction that results in a blue image. The image is then "fixed" by exposing the proofing paper for several seconds to bright visible light, or to room light for approximately an hour."
Bruce, again.
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This would be terrific it it really does help to detect watermarks on stamps affixed to covers! I hope someone has tried it and can post the results here. Thanks for posting this information.
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I am waiting on a friend who works for a company that sells paper of all types to find out of if they have it.
Bruce
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Hi Everyone;
I just Googled the material and it seems that you can buy it from many sources. But the key
will probably be the details of the steps and process.
Just a driftin' thru....
TuskenRaider
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01:32:52am
Hi All
Playing around on the Internet I found the following information that book collectors use to detect and display antique watermarks in books.
There is a Dylux 503 Instant Proof Paper that is required.
The process involves placing the watermarked paper and the Dylux 503 in close contact and exposing the sheets to visible fluorescent light for one to five minutes. Since the watermark creates a thinness in the paper, the visible light passes through this thinness with greater intensity and thus nullifies the yellow dye coating on the Dylux 503 sheet. Following exposure, the sheets are separated and the exposed Dylux is passed under a long wave ultraviolet light. This irradiation causes the unaffected coating to turn a bright blue, and the watermark emerges as a white image. The costs of this process is about 7 cents per copy.
So now, this might or might not be a way for stamp collectors who seem to have trouble with watermarks. Some U. S. Stamp Collectors seem to think that Single Line Watermarks are difficult to detect. They are a challenge, but with a little bit of work, my results seem to work for me. Usually just changing the angle of your light works for me on Single Line Watermarks.
Do not know if this Dylux method is of use or not, thought I'd pass it on to all members of StampoRama.
If any of you try it out, let us all know what success or failure you have experienced!
DAVID THOMPSON
MSGT/USAF/RETIRED
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this post
09:52:44am
re: A Different Way to Watermark
Sounds interesting and inexpensive.
Bruce
After posting the above I found this article:
http://www.gravell.org/wizard.php%3F%26%26offset%3D%26rectotal%3D%26query%3D
Here is an excerpt:
"Gravell was drawn into the world of watermarks in 1970 because of his extensive stamp collection. He owned several German "inflation stamps" from the 1930s and he wanted to copy their watermarks. Verifying the watermarks would increase the value of the stamps. The stamps, however, were on letters. "That made them more valuable," says Gravell, "but it also seemed to make it impossible to get a copy of the watermark."
In the midst of this quandary, he learned about "Dylux" 503 photosensitive paper, a proofing product DuPont had just introduced to the printing industry. In its broadest graphic arts application, a film negative of the material to be proofed is laid over "Dylux" paper and exposed to ultraviolet light. This produces a chemical reaction that results in a blue image. The image is then "fixed" by exposing the proofing paper for several seconds to bright visible light, or to room light for approximately an hour."
Bruce, again.
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10:00:31am
re: A Different Way to Watermark
This would be terrific it it really does help to detect watermarks on stamps affixed to covers! I hope someone has tried it and can post the results here. Thanks for posting this information.
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01:51:46pm
re: A Different Way to Watermark
I am waiting on a friend who works for a company that sells paper of all types to find out of if they have it.
Bruce
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this post
re: A Different Way to Watermark
Hi Everyone;
I just Googled the material and it seems that you can buy it from many sources. But the key
will probably be the details of the steps and process.
Just a driftin' thru....
TuskenRaider
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this post