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| Start / | Knowledge / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Gums / Printers Waste |
Gum printers waste: during the production of a gum arising printers waste |
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Missing gum: postage stamp with not carried out gum caused by printers waste |
Gum colour printers waste: printers term for a deviation from the intended gum colour caused by printers waste |
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Bark gum: postage stamp with unevenly thick and very streaky gum caused by printers waste |
Streaked gum: postage stamp provided with a unevenly gum with stripes, elongated grooves and / or small gum-free areas caused by printers waste |
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Gum with alien element: postage stamp in which an alien element was included in the gum caused by printers waste |
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