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MACHIN STAMP PAPERS

Variations discovered

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Fred Sellars23/10/2021 12:27:44
735 forum posts
360 photos

Having said that, a problem for which I originally thought had been rectified with the additional use of optical brightening agents, seems to have appeared once again in the form of contaminated papers containing fluorescent fibres, this time used to print the 1990 15p 150th anniversary of the first adhesive postage stamps, I have taken two scans of them, once in ultraviolet light and another under UV then filtered into mono so as to enhance the fibres found, please see the attachments >

img_20211023_113716.jpg

img_20211023_114033.jpg

Have you got these paper errors in your collection ? Fred.

Fred Sellars06/11/2021 16:58:53
735 forum posts
360 photos

Apologies for the duplication error made of the 15p double headers, and to make up for it l can now show you a similar contaminated paper error that can be found on the 30p sage green (ACP) stamps that was first issued on the 26th of September 1989.

The first attachment as seen under long wave ultraviolet >

img_20211106_162639.jpg

With the same stamps, but filtered into mono >

img_20211106_162539.jpg

There are so many different values with this type of paper error, its hard to keep pace, once again sorry for the duplication. Fred.

Fred Sellars20/11/2021 14:01:19
735 forum posts
360 photos

Change of paper to print stamps.

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. >

img_20210907_130811.jpg

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.

img_20211020_103347.jpg

Now seen under long wave ultraviolet light ! >

img_20211020_193120.jpg

This type of "dead" paper was the prelude of things to come.

Fred.

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