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