Knowledge / Separation Methods / Perforations / Mistakes

Perforation Mistake: printers term for a deviation caused by a perforation mistake

Missing Perforation: postage stamp with not executed perfor-ation caused by mistake (imper-forated)

Partly Missing Perforation: postage stamp with partly not executed perforation caused by mistake

Missing Perforation Hole: perforation with broken tooth needle and therefore a hole is missing in the perforation line caused by mistake

Perforation Size Mistake: printers term for a deviation from the intended perforation size caused by mistake

Perforation Number Error: philatelic term for a deviation from the intended perforation number caused by mistake

Partly Perforation Number Error: philatelic term for a partly deviation from the intended per-foration number caused by mistake

Fluctuating Number Of Teeth: postage stamp with uneven distance between the teeth caused by mistake

Fluctuating Perforation Holes: postage stamp with the perforation holes do not stay in line caused by mistake

Shifted Perforation: postage stamp with shifted perforation to another position as intended caused by mistake

Badly Centered Perforation: postage stamp with shifted per-foration which is extended over multiple sheet positions caused by mistake

Inverted Perforation: postage stamp with 180 degrees rotated perforation caused by mistake

Double Perforation: postage stamp with twice instead once perforation caused by mistake

Partly Double Perforation: postage stamp with partly twice instead once perforation

Albino Perforation: postage stamp with not fully punched out perforation holes but only slightly pressed in

Partly Albino Perforation: postage stamp with partly not fully punched out perforation holes but only slightly pressed in

Oblique Perforation: postage stamp with the perforation lines are not aligned parallel to the design print

Oblique Perforation: postage stamp with the perforation lines are not aligned parallel to the design print

Rough Perforation: postage stamp with imperfect perforation were provided with paper residue in the perforation holes