PUNCHING UNEVENNESS EVALUATION METHOD, PUNCHING UNEVENNESS EVALUATION DEVICE, AND PUNCHING UNEVENNESS CORRECTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a punching unevenness evaluation method or the like for easily evaluating punching unevenness occurring when a printed sheet is punched by a punching device. SOLUTION: The punching unevenness evaluation method is composed of a punching step for punching a sheet-like testpiece S by the punching device 1 as an evaluation target and an observation step for observing a light leakage pattern formed by a leakage of light to the other face part side of the testpiece S. It is possible to detect punching defects by comparing the light leakage pattern with a target light leakage pattern formed when normally punched. COPYRIGHT: (C)2007,JPO&INPIT