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General Philatelic/Identify This? : Netherlands Phosphorescent Stamps

 

Author
Postings
HolocaustStamps

22 May 2021
10:49:15pm
I was checking some Canadian stamps for tagging and a couple Netherlands stamps on the desk were glowing - obviously printed on phosphorescent paper (the other ones still looked dull).

1) I looked in my Scotts 2017 Catalogue and can't find a listing for a 6c phosphor version. Does anyone know of such a listing?

2) The 8c is listed as #406 in phosphor - but Unwatermarked. My copy has the circles watermark, but I can't find a listing for that version either. Anyone know what it would be?

Many thanks.

Dave




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holocauststampsproject.ca
jmh67

23 May 2021
05:54:21am
re: Netherlands Phosphorescent Stamps

Could be an optical brightener - or the stamps have been soaked together with luminescent ones. Which color was the glow?

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HolocaustStamps

23 May 2021
08:21:43am
re: Netherlands Phosphorescent Stamps

The stamps were a stark, even white on the gum and face side. No spottiness that it might have picked up from contact with a phosphor stamp.

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holocauststampsproject.ca
jmh67

23 May 2021
01:48:20pm
re: Netherlands Phosphorescent Stamps

Stark white sounds very much like optical brightener.

Fluorescence is mostly yellowish and remains visible while the (long wave) UV lamp is on, phosphorescence often reddish, sometimes purple-ish, but is visible as an afterglow once you remove the (short wave) UV lamp.

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Author/Postings
HolocaustStamps

22 May 2021
10:49:15pm

I was checking some Canadian stamps for tagging and a couple Netherlands stamps on the desk were glowing - obviously printed on phosphorescent paper (the other ones still looked dull).

1) I looked in my Scotts 2017 Catalogue and can't find a listing for a 6c phosphor version. Does anyone know of such a listing?

2) The 8c is listed as #406 in phosphor - but Unwatermarked. My copy has the circles watermark, but I can't find a listing for that version either. Anyone know what it would be?

Many thanks.

Dave




Like
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this post

holocauststampsproje ...
jmh67

23 May 2021
05:54:21am

re: Netherlands Phosphorescent Stamps

Could be an optical brightener - or the stamps have been soaked together with luminescent ones. Which color was the glow?

Like
Login to Like
this post
HolocaustStamps

23 May 2021
08:21:43am

re: Netherlands Phosphorescent Stamps

The stamps were a stark, even white on the gum and face side. No spottiness that it might have picked up from contact with a phosphor stamp.

Like
Login to Like
this post

holocauststampsproje ...
jmh67

23 May 2021
01:48:20pm

re: Netherlands Phosphorescent Stamps

Stark white sounds very much like optical brightener.

Fluorescence is mostly yellowish and remains visible while the (long wave) UV lamp is on, phosphorescence often reddish, sometimes purple-ish, but is visible as an afterglow once you remove the (short wave) UV lamp.

Like
Login to Like
this post
        

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