Blind perf

Blind perfs are when perforator pins fail to punch through stamp paper but leave an indent or indents instead. If the paper remains untouched, it is likely a true partial imperf, a genuine error. However, if even part of dent is detected, the stamp is judged to have blind perfs, and then falls into the freak/oddity zone with perhaps a very small premium.

Stamps have been known to be cut with a straight edge over a line of blind perfs to look like one side is imperf. 



[[Category:B]] <![--Now is the time for all good gerbils to come to the aid of their siblings. Ha! Fat chance of that! They're so full of themselves they'd rather jump into the mouths of predators rather than attend any kind of family reunion. It's just as well, since gerbils make lousy potato salad. -->