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#11
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Chalk surface paper
On my stamps no silver wire scratches and no liquids are allowed, only a
trained eye with 8-10x magnification and good ligth. The training can be carried out comparing the appearance of two stamps where the coated paper is coupled with another property such as "papier grille"(sorry my english fails) for instance the Swiss stamps Mi 194x-197x uncoated paper and Mi 194z-197z chalksurfaced paper which is also "papier grille". . In this way coated and noncoated can be determined. If you realy want to know if the coating is chalk use a stereo microscope 25x. and compare the stamp in question with a stamp which surely is chalk coated. Tim der Kinderen "malcolm" schreef in bericht oups.com... If trying to identify using the uv lamp scan the back as well as the front. If the back reacts too the flourescing agent has been added to the paper at the manufacturing stage and is not a coating. This does not mean that the stamp has/has not got a coating in addition - but will help in any process of elimination. Also check for a dated postmark. Any stamp with a postmark before the date of the new issue will be 99% certain to be the first issue ( unless the postmark date has been set in error). Regrettably the opposite cannot be said as stamps from the first issue can "hang around" for months after the date of the second. However stamps used years after the date of change are most likely to be the second issue. As in most of these matters comparison with a known example is the best guide. Also coated papers tend to have a "sharper" image than uncoated. As an alternative to dry lips use the very tip of your little finger ( this is very sensitive ) and a coated paper should feel smoother. Any further "old wives tales" on this subject would be welcome. Probably a combination of methods will elicit a high probability of correct indentification Malcolm |
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#12
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Chalk surface paper
Tim,
I mentioned Swiss stamps as being with chalky paper and people having an obsession for this kind of distinction of stamps. Another way of looking at the chalky ones is having a good look at where the coating is peeling off; obviouslyuncoated stamps can't have a peeling-off coating P.S. I'll give you a reference to my website about Swiss stamps later on - all in Dutch but that shouldn't be a problem .... Op Fri, 14 Sep 2007 21:31:28 +0200 schreef Tim der Kinderen : On my stamps no silver wire scratches and no liquids are allowed, only a trained eye with 8-10x magnification and good ligth. The training can be carried out comparing the appearance of two stamps where the coated paper is coupled with another property such as "papier grille"(sorry my english fails) for instance the Swiss stamps Mi 194x-197x uncoated paper and Mi 194z-197z chalksurfaced paper which is also "papier grille". . In this way coated and noncoated can be determined. If you realy want to know if the coating is chalk use a stereo microscope 25x. and compare the stamp in question with a stamp which surely is chalk coated. Tim der Kinderen "malcolm" schreef in bericht oups.com.. If trying to identify using the uv lamp scan the back as well as the front. If the back reacts too the flourescing agent has been added to the paper at the manufacturing stage and is not a coating. This does not mean that the stamp has/has not got a coating in addition - but will help in any process of elimination. Also check for a dated postmark. Any stamp with a postmark before the date of the new issue will be 99% certain to be the first issue ( unless the postmark date has been set in error). Regrettably the opposite cannot be said as stamps from the first issue can "hang around" for months after the date of the second. However stamps used years after the date of change are most likely to be the second issue. As in most of these matters comparison with a known example is the best guide. Also coated papers tend to have a "sharper" image than uncoated. As an alternative to dry lips use the very tip of your little finger ( this is very sensitive ) and a coated paper should feel smoother. Any further "old wives tales" on this subject would be welcome. Probably a combination of methods will elicit a high probability of correct indentification Malcolm -- Gemaakt met Opera's revolutionaire e-mailprogramma: http://www.opera.com/mail/ |
#13
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Chalk surface paper
Tim,
Swiss chalky paper: http://www.xs4all.nl/~dziewon/fila/helv_ctg.htm groetjes, Rein Op Fri, 14 Sep 2007 21:31:28 +0200 schreef Tim der Kinderen : On my stamps no silver wire scratches and no liquids are allowed, only a trained eye with 8-10x magnification and good ligth. The training can be carried out comparing the appearance of two stamps where the coated paper is coupled with another property such as "papier grille"(sorry my english fails) for instance the Swiss stamps Mi 194x-197x uncoated paper and Mi 194z-197z chalksurfaced paper which is also "papier grille". . In this way coated and noncoated can be determined. If you realy want to know if the coating is chalk use a stereo microscope 25x. and compare the stamp in question with a stamp which surely is chalk coated. Tim der Kinderen |
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