Appendix Requirement for black mark printing [2] [1] Paper feed direction Preprintable area 30 to 300 3 to 5 Units: mm Back(non-printing side) The allowable relation between the reflecting rate in the black mark portion (1) and the non black mark portion (2) must be as shown in the below: Black mark portion (1): 16% or less Non black mark portion (2): 85% or more The reflecting rate means the value which is measured with a Macbeth density meter (PCMII) D filter. 93 15 or more