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Multiple crown Wilding phosphors with variations.

Noticing the difference.

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Fred Sellars29/08/2019 21:27:50
205 forum posts
67 photos

img_20190822_112047.jpgimg_20190823_110852.jpgI was recently checking through some Wildlings sorting the plain from the phosphor ones and noticed that some of the bands on the phosphor stamps could hardly be seen where on some others they appeared quite blatant and had a matt finish, however, others showed a more silky finish and in some cases you could hardly see them at all when comparing the same values.

I realise that there are various methods of applying the bands such as photogravure, letterpress (typo), flexography where some bands being as "varnished", in fact it's quite a mystery to most general collectors of this issue.

Showing you examples is sometimes the best means of contact with three initials scans then I can let you see.

One picture is the difference between photo and typo on the 4•5d value, apparently the photo printed bands have the same width in the margins of the rest of the sheet but letterpress (typo) bands have a narrow band on both margins on either side of the sheet due to the way they were printed.

The other two is of the 4d and 7d showing both a matt and silky finish.

Can anyone account for the differences on both the 4d and 7d stamps as this anomaly seems to occur on several other values also.img_20190823_113140.jpg

Fred Sellars08/09/2019 23:44:07
205 forum posts
67 photos

img_20190908_224522.jpgFurther to my thread posted on the 29/8/19, I can now show you additional scans highlighting the difference between matt and glazed phosphor bands on the Wilding definitives, both of which are 9•5mm violet phosphors.

I took two scans and reversed their positions in order to get equilibrium,and it can be clearly seen that there is a difference between the bands.

The 10d showing a glazed or silky finish with the 1/- value having a matt finish.

Have two different phosphors been used or have they been applied differently ?

All I can do is show you the difference,if anyone seeing the differences with any technical knowledge can explain the variances I would be most grateful for the information.

Thank you, Fred.

img_20190908_223922.jpg

Fred Sellars12/09/2019 11:26:48
205 forum posts
67 photos

img_20190911_005751.jpgimg_20190911_010842.jpgI can now include additional values showing phosphor variations, if you have also noticed the difference on some of your stamps of this period please make contact, as this is what a forum is all about.

Thank you, Fredimg_20190911_010058.jpg

Fred Sellars07/10/2019 18:36:14
205 forum posts
67 photos

As can be seen by the previous scans, there is definitely a difference between the two types of Matt and Glossy phosphor bands depicted .

It would appear that a different phosphorescent chemical has been used to print the bands due to their apparent differences.

I have heard that some violet phosphors fade very quickly with their afterglow, after being radiated by shortwave ultraviolet light whilst others fade more slowly .So why should that be ?

I feel that there is still a lot of questions that need answering on these multiple crown Wildings, both on phosphors and papers used in their production .

Fred Sellars28/10/2019 14:10:30
205 forum posts
67 photos

img_20190607_172733.jpgimg_20191024_172930.jpgOn looking at the variations on some of the phosphors, one of the more interesting values appears to be the 7d, as it comprises of paper variances with fibrillous types also included, phosphor variances, cream and whiter papers and also a different shade of ink in the printing along with different perforators .

My first scan shows the 7d from cylinder 1 no dot and cylinder 2 no dot, it can be seen in the marginal rule but there is a difference in the shade of ink used to print the stamps, cylinder 1 no dot is darker than cylinder 2 no dot and the phosphor bands on cylinder 1 is much fainter as the cylinder 2 bands appear to be more pronounced .

The type of perforator used is also different , cylinder 1 is a type 'F' and cylinder 2 is type 'A' .

In my second scan taken under ultraviolet you will also notice what the the phosphor bands on cylinder 2 no dot has a yellowish tinge, unlike the others in comparison .

My third and last scan in this posting was taken under ultraviolet light and filtered into mono, it depicts the differences in papers and perforators used, with the the fibrillous (FIB'S) type papers in columns D+E on cylinder 1 no dot .

img_20190708_003528.jpg

Edited By Fred Sellars on 28/10/2019 14:13:11

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