Fluorescent surface coating fugitive !
|Fred Sellars||14/09/2020 11:14:38|
|399 forum posts|
Back in the early 70s it would appear that the decimal Machins had a fluorescent coating added to their surface in order to aid the A L F section of the automatic sorting system at the GPO.
I have discovered by the use of a long wave ultraviolet light that this fluorescent coating applied was highly fugitive once submerged in water 💦 . It came about when I was soaking off some of these issues (pre 93 non ellipticals) and found that the tissue used to dry them had been impregnated with a fluorescent substance....
From my findings it would appear that the fluorescent surface coating applied to the stamps was the culprit, I was aware that certain Victorian stamps had been printed with fugitive inks in the past such as the "lilac & greens", but to find this on modern day stamps was something of an eye-opener !
Over the years millions of these used stamps must have been soaked off paper, have you checked the ones in your collection for contamination ?
As an afterthought, I would NOT mix other issues, including Wildings and others with these stamps when soaking off paper for fear of contamination !
Edited By Fred Sellars on 14/09/2020 11:39:48
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