Technical Reference Guide – Appendix D – Media specifications > 226Oval hole size is shown below, dimensions in mm:Make sure that chad arising from sprocket hole punching doesnot remain on the paper.PERFORATION DIMENSIONS> Perforations must be able to withstand full-speed paperfeed and be easy to tear.> Uncuts (i.e. uncut segments) of perforations must beuncut securely, and not be torn at any position. Note thatuncuts particularly on folding lines are apt to tear.> For proper proportion of cut to uncut for perforations,which is determined according to paper quality, weightand the number of form parts, the following isrecommended:> Horizontal perforations1 – 2 mm of each side edge is to be uncut. Printing is notto be performed within 12.7 mm (1/2 in) of each horizontalperforation.> Vertical perforationsPrinting is not to be performed within 6.35 mm (1/4 in) ofany vertical perforation that runs in printing areas. Thecuts of vertical and horizontal perforations are to uncrossNUMBER OFFORM PARTSCUTLENGTHUNCUTLENGTHHorizontal perforationRear tractor1 – 6 2 – 3 mm 1 mmVertical perforation Reartractor1 – 6 3 mm 1 mm6–0.14–0.1
