| Perforation type |
IDENTIFICATION |
| Hole form |
Arrangement of holes |
Additional identification |
Sizes and step of holes |
| Round holes in shifted rows |
R |
V |
|
W-t |
| Round holes in diagonally shifted rows |
R |
d |
|
W-t |
| Round holes in straight rows |
R |
g |
|
w-t |
| Square holes in shifted rows |
Q |
V |
|
w-t |
| Square holes in diagonally shifted rows |
Q |
d |
|
w-t |
| Square holes in straight rows |
Q |
g |
|
w-t |
| Oblong holes in shifted rows |
L |
V |
|
w I - t 1-t2 |
| Oblong holes in straight rows |
L |
g |
|
w I - t 1-t2 |
| Oblong holes in rows shifted in relation to each other |
L |
gv |
|
w I - t 1-t2 |
| Rectangular holes in shifted rows |
L |
V |
e |
w I - t -t2 |
| Rectangular holes in straight rows |
L |
G |
e |
w I - t 1-t2 |
| Rectangular holes in rows shifted in relation to each other |
L |
gv |
e |
w I - t -t2 |
