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What Are Blind Perfs

 
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Posted 05/05/2019   7:44 pm  Show Profile Bookmark this topic Add DrGG to your friends list Get a Link to this Message
Do blind perfs affect the value of a stamp?
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Posted 05/05/2019   7:54 pm  Show Profile Bookmark this reply Add rod222 to your friends list  Get a Link to this Reply

Quote:
Do blind perfs affect the value of a stamp?

Unknown, I'd guess it depended on the stamp in question.
Blind perfs are indentations or similar, in the stamp paper, due to the puncturing pins failure to penetrate the paper successfully, due to wear or multiple sheets attempted.
Canada example
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Posted 05/05/2019   8:01 pm  Show Profile Bookmark this reply Add redwoodrandy to your friends list  Get a Link to this Reply
See SCF glossary over to the left under navigation for a definition start.
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Posted 05/05/2019   8:01 pm  Show Profile Bookmark this reply Add Petert4522 to your friends list  Get a Link to this Reply
Blind perfs happen when the perforator pins do not go all the way through the paper. A small indentation will show where the perf is supposed to be. Happens quite a lot on coil stamps but I do not know how it affects the value


Peter
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Posted 05/05/2019   8:07 pm  Show Profile Bookmark this reply Add ClassicPhilatelist to your friends list  Get a Link to this Reply
DrGG,
Generally speaking blind perfs do not adversely affect the value of a stamp. Have sold many stamps with blind perfs, and no change to value.
Generally speaking, they can often be removed very carefully by those who wish their stamp to have that "stamp shape", buy using tweezers and a very careful hand. BUT, it's not without risk in trying to remove them, so consider your skill, and the value of the stamp if you choose to do this.
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Posted 05/05/2019   10:02 pm  Show Profile Bookmark this reply Add bookbndrbob to your friends list  Get a Link to this Reply
In German philately, there is related, but slightly different phenomenon. On the old stamps, there is what is known as FZL "fehlende Zahnungslochungen", or missing perforation hole(s). These are caused by broken perforation pin(s).

THe expertizer has noted this on the stamp shown below.



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Posted 05/06/2019   9:21 pm  Show Profile Bookmark this reply Add ClassicPhilatelist to your friends list  Get a Link to this Reply
Yes, missing perfs are another issue. And some blind perfs shouldn't be touched, because there is only the "impression" of a perf hole, but the pin did not actually penetrate the paper (or is less than 25% cut). Those you want to leave alone.
broken pens, or bent pens can leave missing or wildly out of alignment perfs.
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Posted 05/09/2019   5:55 pm  Show Profile Bookmark this reply Add wert to your friends list  Get a Link to this Reply

Quote:
Blind perforation
Intended perforations that are only lightly impressed by the perforating pins, leaving the paper intact, but cut or with a faint impression. Some stamps that appear to be imperforate really are not if they have blind perfs. Stamps with blind perfs are minor varieties carrying little, if any, price premium over normally perforated copies.


Explanation as per SCF

Here is a Nova Scotia example.

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Posted 05/09/2019   6:07 pm  Show Profile Bookmark this reply Add James Drummond to your friends list  Get a Link to this Reply
I wonder if this terminology originated from the similarity of the raised, unpunched perforations on the stamps to the way the braille alphabet is printed?

Jim
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