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| Start / | Knowledge / | Separation Methods / |
| Accidentals | Changes | Designs | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Safety Measures | Quality |
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Knowledge / Separation Methods / Perforations / Designs |
Perforation design: artistically designed perforation holes |
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Circular perforation holes: perforation with circular-shaped holes |
Ellipticale perforation holes: perforation with oval-shaped holes |
Diamond-shapede perforation holes: perforation with diamond-shaped holes |
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Dinosaur perforation holes: pictorial representation of dinosaur as perforation holes |
Oak leaf perforation holes: pictorial representation of oak leaves as perforation holes |
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Ellipses perforation holes: pictorial representation of ellipses as perforation holes |
Circle perforation holes: pictorial representation of circles as perforation holes |
Cross perforation holes: pictorial representation of crosses as perforation holes |
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Rhomb perforation holes: pictorial representation of rhombs as perforation holes |
Star perforation holes: pictorial representation of stars as perforation holes |
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Star and crescent perforation holes: pictorial representation of stars and crescents as perforation holes |
USA perforation holes: pictorial represen-tation of the letters USA as perforation holes |
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