stainlessb
Member 
qaStaHvIS yIn 'ej chep
Posts: 4,310
What I collect: currently focused on most of western Europe, much of which is spent on France, Belgium, Germany and Great Britain Queen Victoria
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Post by stainlessb on Jan 21, 2019 17:10:37 GMT
Discovered this this morning... The Barcode was patented in 1952, but when in US stamps does this come into play? This doesn't look as much fun as my Dick Tracy Decoder ring!   |
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hrdoktorx
Member
Posts: 5,980
What I collect: France (and French territories), Africa, Canada, USA, Germany, Guatemala, stamps about science, flags, maps, stamps on stamps...
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Post by hrdoktorx on Jan 21, 2019 20:31:49 GMT
I have one of those too. It's a polarizing light filter that allows you to see some hidden designs on certain stamps (for instance the ones illustrated on the decoder packaging). I don't think the USPS continued this practice very long.
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Ryan
Member
Calgary, Alberta, Canada
Posts: 2,627 
What I collect: If I have a catalogue for it, I collect it. And I have many, many catalogues ....
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Post by Ryan on Jan 21, 2019 21:01:07 GMT
I have one of those too. It's a polarizing light filter Actually, it's a lenticular lens. These are the things used in those odd "3-D" stamps from Umm al Qiwain and such places. One of my favourite modern abstract artists is Yaacov Agam from Israel. He has long used lenticular printing in his art. This brief video clip gives a good overview of many of the styles he's used over his career - at the 0:30 mark, he is holding a piece which uses lenticular printing. And for stainlessb , this website gives a list of all the US stamps which used lenticular printing for use with your decoder. Elsewhere on that site you can see scans of the stamps in question with the area of interest circled so you will know where to look. A while back on TSF I posted some photos on a "mystery box" thread (a firstfrog2013 giveaway) - you can see how the hidden image appears as the lenticular lens gradually aligns with the printing. Ryan |
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stainlessb
Member
qaStaHvIS yIn 'ej chep
Posts: 4,310
What I collect: currently focused on most of western Europe, much of which is spent on France, Belgium, Germany and Great Britain Queen Victoria
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Post by stainlessb on Jan 21, 2019 21:40:36 GMT
this sounds like too much fun  |
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