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| Start / | Knowledge / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Luminescence / Errors |
Luminescence error: philatelic term for a luminescence deviation caused by error |
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Missing fluorescence: postage stamp with no fluorescence caus-ed by error |
Missing phosphorescence: postage stamp with no phosphor-escence caused by error |
Double phosphorescence: postage stamp with twice in-stead once phosphorescence caused by error |
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Missing fluorescence additional printing: postal stationery with no fluorescence additional printing caused by error |
Inverted fluorescence additional printing: postal stationery with 180 degrees rotated fluorescence additional printing caused by error |
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