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| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Luminescence / Accidentals |
luminescence accidental: philatelic term for a luminescence deviation caused by accidental |
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shifted fluorescence: postage stamp with shifted fluorescence to another position as intended caused by accidental |
shifted phosphorescence: postage stamp with shifted phosphorescence to another position as intended caused by accidental |
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shifted fluorescence additional printing: postal stationery with shifted fluorescence additional printing to another position as intended caused by accidental |
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