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Embossing or not?! Bedazzled :)  
 

 
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Pillar Of The Community

Netherlands
641 Posts
Posted 06/03/2018   2:32 pm  Show Profile Bookmark this topic Add Galeoptix to your friends list Get a Link to this Message
In his book Fundamentals of Philately Leon Norman Williams describes the printing method of embossing in 50 pages!

A tremendous load of data gathered through a life-time!




After reading it you are dazzled and still do not really know what embossing is about apart from the fact that it leaves a 3-dimensional image made from a DIE and its counterpart.

Williams also uses the term "force" and then I feel a bit back in Star Wars ...


I tend to describe works like Williams' as "Metaphilately" i.e. a compilation of data ABOUT stamps rather than the result of a close study of the stamps themselves.
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Pillar Of The Community
Netherlands
641 Posts
Posted 06/03/2018   2:49 pm  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
Even though it is in German the image tells the story:



Some examples!

Finland:





German stamp:






From this I pose the statement that we should only speak of embossing when BOTH sides "speak out" and show a relief ...
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Pillar Of The Community
Netherlands
641 Posts
Posted 06/03/2018   3:06 pm  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
A one-side "embossing" occurs quite often in stamps printing in typography!



This relief is often quoted as being THE characteristic of typography!


In http://www.americanstampdealer.com/....aspx?id=226

Quote:

Engraved stamps show the ink lines slightly raised above the surface of the stamp and show corresponding depressions on the back. The degree of this depends on the relative depth of the engraved lines and on the ink and the paper used. Typography, the exact reverse of engraving, shows a slight raising of the lines on the back. More important for our purpose is the fact that the pressure of the typographic printing plate causes the ink to be squeezed toward the edges of the printed surfaces. This is visible as a fine frameline around the printed parts when one looks through the stamp under high magnification. The degree of this "framelining" depends on the pressure applied during printing and on the viscosity of the ink, and is a typical characteristic of each issue.
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