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| Start / | Knowledge / | Prints / |
| Accidentals | Changes | Designs | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality | Safety Measures |
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Knowledge / Prints / Postage Stamp Burelages / Quality |
Postage Stamp Burelage Quality: subjective assessment of the quality of all properties of a postage stamp burelage |
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Faultless Postage Stamp Burelage: postage stamp burelage without conditional of manufacturing or wrong handling origi-nated quality defect |
Discoloured Postage Stamp Burelage: postage stamp burelage with changed colour by light or chemical reaction |
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