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Old September 9th 07, 07:08 PM posted to rec.collecting.stamps.discuss
Rein
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Posts: 335
Default (RCSD) Chalk surface paper

Douglas,

so isn't the real problem to get coated paper distinguished from
non-coated papers???
And in such a way that the method will be non-destructive? Using silver
sounds like barbarism.

I'm not sure whether I can count on my catalogues as to what type of
papers are involved. Maybe in the early 20th century philatelists had an
obsession for chalky paper [not just Anglosaxon countries but also
Portugal, Switzerland] but later on - and certainly in the last few
decennia - hardly anybody cares for the paper itself. They may want to
distinguish types of phosphor and the like, but not the base paper or the
immediate coatings underneath the printing inks....

groetjes, Rein


Op Sun, 09 Sep 2007 18:35:25 +0200 schreef Douglas Myall
:


"Blair (TC)" wrote in message
oups.com...
On Sep 9, 9:55 am, "news.knology.net" wrote:
How can you tell if a stamp is chalk surfaced or not?



Chalky paper, used especially on British stamps, is easy to

identify.
Chalk-surfaced stamps when rubbed with silver will leave a black

mark
on
them. Be careful when testing these and just touch a small corner or
part
of the stamp.

You can sort out some of the modern ordinary & chalky paper stamp
issues with an Ultra-Violet lamp.

Blair



What Blair says is perfectly true but you need to know whether the
paper you are testing is indeed coated with chalk; some papers are
coated with other materials, such as china clay. In addition, all
coated papers need to be distinguished from those where the filler is
added to the pulp mix. Your catalogue should tell you what the papers
are for the stamps you are interested in.

Douglas





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