Post by Deleted on May 3, 2022 23:13:52 GMT
A change of paper to print stamps.
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It would seem that with the many variations of fluorescent papers and non-fluorescent papers with fluorescent coatings being produced combined with some contaminated papers being used to print British stamps previously, a new type of paper was introduced in 1992 in order to rectify the situation, as the fluorescent coatings in the past had been found to be fugitive when moistened.
The next picture is of a tissue previously used for drying off some 1980's Machin used stamps, as can be seen in the next attachment. >
The new paper that was introduced had been processed in such a way that it was completely void of any fluorescent compounds, including coatings that had previously been used, and it meant that future printings of definitives and commemoratives would no longer be plagued with contaminants, fugitive coatings and variations in paper as in the past and would give a greater uniformity in the quality control of stamp papers for the future.
The first stamps to be printed using this type of "dead" paper was the high value 'castles' with a gold head effigy of the Queen issued on the 24th March 1992 consisting of initially four values £1, £1-50, £2 and £5, these stamps replaced the previous high values printed on fluorescent paper with coatings originally issued on the 18th of October 1988, the "gold head" stamps were also the first stamps to have a single eliptical perforation on either side of the stamp as an additional security measure.
Here is a picture of the old and new high values as seen in the normal spectrum. >
Now as seen under long wave ultraviolet light ! >
This type of "dead" paper was the prelude of things to come.
~~~~~~~~~~~~~~~~~~~~~~~
It would seem that with the many variations of fluorescent papers and non-fluorescent papers with fluorescent coatings being produced combined with some contaminated papers being used to print British stamps previously, a new type of paper was introduced in 1992 in order to rectify the situation, as the fluorescent coatings in the past had been found to be fugitive when moistened.
The next picture is of a tissue previously used for drying off some 1980's Machin used stamps, as can be seen in the next attachment. >
The new paper that was introduced had been processed in such a way that it was completely void of any fluorescent compounds, including coatings that had previously been used, and it meant that future printings of definitives and commemoratives would no longer be plagued with contaminants, fugitive coatings and variations in paper as in the past and would give a greater uniformity in the quality control of stamp papers for the future.
The first stamps to be printed using this type of "dead" paper was the high value 'castles' with a gold head effigy of the Queen issued on the 24th March 1992 consisting of initially four values £1, £1-50, £2 and £5, these stamps replaced the previous high values printed on fluorescent paper with coatings originally issued on the 18th of October 1988, the "gold head" stamps were also the first stamps to have a single eliptical perforation on either side of the stamp as an additional security measure.
Here is a picture of the old and new high values as seen in the normal spectrum. >
Now as seen under long wave ultraviolet light ! >
This type of "dead" paper was the prelude of things to come.
