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Help on what these glowing orange cancels are?

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Valued Member
United States
260 Posts
Posted 11/14/2017   3:13 pm  Show Profile Bookmark this topic Add 3193zd to your friends list Get a Link to this Message
I have 3 stamps with red, black and blue cancels that glow orange under UV. Were these common and what purpose did they serve? I think they are permit cancels? Also are why do the stamps tagging and paper glow differently?

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Michael Darabaris

Pillar Of The Community
United States
1001 Posts
Posted 11/14/2017   3:35 pm  Show Profile Bookmark this reply Add hy-brasil to your friends list  Get a Link to this Reply
Yup, permit cancels. Many fairly modern inks (including stamp pad ink) have optical brighteners among other things including components that glow under UV, so this is probably what we're seeing. Different ink mixes (say, from different manufacturers) would glow differently. And these happen to glow orange.
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Edited by hy-brasil - 11/14/2017 3:43 pm
Valued Member
United States
393 Posts
Posted 11/17/2017   12:01 pm  Show Profile Check jobi01's eBay Listings Bookmark this reply Add jobi01 to your friends list  Get a Link to this Reply
Permit cancels are privately and are required to meet certain specifications which do not include how they appear under UV.
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Bill Lehr
US Postal Stationery Specialist
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