Technical Reference Guide – Appendix D – Media specifications > 226
Oval hole size is shown below, dimensions in mm:
Make sure that chad arising from sprocket hole punching does
not remain on the paper.
P
ERFORATION
DIMENSIONS
> Perforations must be able to withstand full-speed paper
feed and be easy to tear.
> Uncuts (i.e. uncut segments) of perforations must be
uncut securely, and not be torn at any position. Note that
uncuts particularly on folding lines are apt to tear.
> For proper proportion of cut to uncut for perforations,
which is determined according to paper quality, weight
and the number of form parts, the following is
recommended:
> Horizontal perforations
1 – 2 mm of each side edge is to be uncut. Printing is not
to be performed within 12.7 mm (1/2 in) of each horizontal
perforation.
> Vertical perforations
Printing is not to be performed within 6.35 mm (1/4 in) of
any vertical perforation that runs in printing areas. The
cuts of vertical and horizontal perforations are to uncross
NUMBER OF
FORM PARTS
CUT
LENGTH
UNCUT
LENGTH
Horizontal perforation
Rear tractor
1 – 6 2 – 3 mm 1 mm
Vertical perforation Rear
tractor
1 – 6 3 mm 1 mm
6–0.1
4–0.1
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