The Print Quality Toolkit is a system for printing, scanning, and evaluating a test target on a workstation or personal computer using image processing techniques for the purpose of high-speed, objective, and mostly automated print quality assessment. The metric set used for this assessment is specified in the ISO/IEC document 13660, that, in turn, was primarily derived from the literature on print quality. As examples of potential applications for the system, we investigate the dependence of these metrics on scan resolution, line width, paper type, and printer technology.