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Green Phosphor ??

 
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Bionicbelly
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Joined: 04 Jul 2009
Posts: 25

PostPosted: Wed Jul 08, 2009 8:46 am    Post subject: Green Phosphor ?? Reply with quote

Hi guys

excuse me if I make a fool of myself, I am a collector who gave up shortly after being married -- ( no money and no time ) anyway, the novelty wore off after about 25 years, and I have now returned to this insane world of philately.

I used to collect GB, specialising in defenitives .. giving up shortly after the intro of decimal machins ... Ah if only ... but alas ..

I am gradually updating my catalogues and equipment and have commenced trying to catch up on 30 odd years that I have missed.

Whilst sorting through some 2nd NVI Light Blues I have come accross some stamps that appear to have a Green central phos band
( Torn perfs so assumed Gummed & with Eliptical perf )

Is this something not yet listed in my literature, a reaction of something else, or should I go toSpecSavers ?


Also, I have found two with no reaction to UV Lamp ( SW or LW ) can I assuem these to be missing phos, or are there others that would give the same result please ?

David
( Bionicbelly )
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cdj1122
Machin Man


Joined: 08 Jul 2007
Posts: 952
Location: Houston, Texas pending eye surgery

PostPosted: Wed Jul 08, 2009 10:34 pm    Post subject: Reply with quote

Welcome to the land of Machinitis, an incurable disease marked but an insatiable desire to sort through bundles of seemingly identical stamps.
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First the good news.
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A simple collection of some 800+ Machins from the first Stirlings through to the stupid security die cuts of this week can be assembled at a nominal cost, especially if you enjoy postally used examples and have the time to wade through kilo lots. In doing so you will almost without effort accumulate many other examples which display some minor variation. And that should bring the collection up to way over 1,000 stamps to find, mount and write up in some way.
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However to really get into the causes of, and reasons for, the minor variations you need to get a copy of Doug Myall's " Complete Deegam Handbook" either the looseleaf book or the disc version.
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In volume one of the handbook, chapter six, Doug explains more about phosphorescence and flourescence than most people will ever care to know. A compendium of the subject in 24 pages complete with images to help guide the collector.
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In that chapter he explains how it came to be and that, for one thing, the Royal Mail wonks did not have any specific mixture requirements for the chemicals being applied as long as they excited ALFfie enough to turn the envelope about so the stamp cancel can miss the stamp as often as not. (Joke) In 1993 they used a YELLOW Flour and in 1995 that was changed to a BLUE flour.
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Since there was no precise standard as mentioned there are variations sometimes described as "greenish yellow", "bluish green" and other steps between.
Keep in mind the color wheel where "blue" and "yellow" mixed give us "Green". So various shades of these colors can be found.
.
_________________
" .... You may think you understood what you thought I said, but I'm not sure you realize that what you think you heard is not what I thought I meant. .... "
Charlie Jensen
Lecanto, Florida
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Bionicbelly
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Joined: 04 Jul 2009
Posts: 25

PostPosted: Thu Jul 09, 2009 3:53 am    Post subject: Thank you Reply with quote

Thank you Charlie

I must admit I have Deegam Cd, but have obviously missed the section you mention Embarassed -- so no excuses, just too much to catch up on and perhaps trying to do it too quickly Embarassed

Oh well , no free holiday this year then Sad


Many thanks

David
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