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Perforation Hole Size Diameter Measurement

 
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Author Previous TopicReplies: 4 / Views: 249Next Topic  
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Posted 08/17/2020   09:35 am  Show Profile Bookmark this topic Add jogil to your friends list Get a Link to this Message
Is there any way to get an accurate perforation hole size diameter measurement? I am going to try using a set of 50 different pin gauges from 0.011" to 0.060" (-0.0002") but I am not going to try to insert them into the perforation holes since they might do damage. Instead, I will ink them on a piece of paper and then compare them.
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Edited by jogil - 08/17/2020 10:08 am

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Posted 08/17/2020   12:00 pm  Show Profile Bookmark this reply Add angore to your friends list  Get a Link to this Reply
I would try to do it with software. Paper is too soft to use pins.
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Al
Edited by angore - 08/17/2020 12:01 pm
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Posted 08/17/2020   1:26 pm  Show Profile Bookmark this reply Add Germania to your friends list  Get a Link to this Reply
I would scan the stamps at high resolution and then measure the diameter using an imaging program. I use Pixelmator, which works well, but other programs should have a similar feature.
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Posted 08/17/2020   2:39 pm  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
The pin gauge set gives a little bit of a reference feel for real perforating pins that may no longer be around.
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Edited by jogil - 08/17/2020 2:41 pm
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Posted 08/17/2020   10:10 pm  Show Profile Bookmark this reply Add banknoteguy to your friends list  Get a Link to this Reply
Here is an interesting analysis of perforation holes which this paper refers to as stamp separation features:

http://www.battleship-revenues.com/...erfMeas.html
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