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| Start / | Knowledge / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Gums / Quality |
Gum Quality: subjective assessment of the quality of all properties of a gum |
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mint never hinged |
mint with sticking point |
mint with hinge part |
mint with hinge |
mint with hinges |
mint part gum |
without gum |
Gum Quality Grades: subjective perception of a gum quality in different grades and conditions |
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Faultless Gum: gum without conditional of manufacturing or wrong handling originated quality defect |
Faulty Gum: common term for a gum with conditional of manufacturing or wrong handling originated quality defect |
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Damaged Gum: gum with quality defect originated by wrong handling |
Labeled Gum: gum with private handwritten text which can not removed traceless |
Discoloured Gum: gum with changed colour by light or chemical reaction |
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