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| Start / | Knowledge / | Safety Measures / |
| Accidentals | Differences | Errors | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Safety Measures / Matrix Codes / Mistakes |
Matrix code mistake: printers term for a deviation caused by matrix code mistake |
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Missing matrix code: postage stamp with not printed matrix code caused by mistake |
Matrix code colour mistake: printers term for a deviation from the intended matrix code colour caused by mistake |
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Shifted matrix code: postage stamp with shifted matrix code to another position as intended caused by mistake |
Inverted matrix code: postage stamp with inverted instead upright matrix code caused by mistake |
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