Discussion - Member to Member Sales - Research Center
Discussion - Member to Member Sales - Research Center
Is this a variety or is there another explanation?
An image is attached which shows three copies: the first (from the left) is most typical of the ones I have seen; the second shows the phosphor bar slightly visible to the naked eye; and the third is the surprise.
J. T. Hurd.
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The phosphor bands appear like this because of the way the stamp has been soaked.
I believe this effect is the result of soaking in hot water and/or for a long period.
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3rd is questa inset L band 1986... others harrison pcp 1980
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Recently I came across a used copy of the 12p emerald green N. Ireland Regional Machin (which was issued in sheets with one left phosphor bar) on which the phosphor bar appears much more vivid to the naked eye than usual.
Is this a variety or is there another explanation?
An image is attached which shows three copies: the first (from the left) is most typical of the ones I have seen; the second shows the phosphor bar slightly visible to the naked eye; and the third is the surprise.
J. T. Hurd.
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re: Machin Regional N. Ireland Phosphor variety?
The phosphor bands appear like this because of the way the stamp has been soaked.
I believe this effect is the result of soaking in hot water and/or for a long period.
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this post
re: Machin Regional N. Ireland Phosphor variety?
3rd is questa inset L band 1986... others harrison pcp 1980
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this post