Color Quality Comparison of Electro-Photographic vs. Inkjet Printing Processes In a Color Managed Digital Printing Workflow (CMDPW)

摘要

n a quest to empower students to better understand the colorimetric attributes of color, this work will examine the industry standard printing process and quality management practices similar to those a student would encounter upon entering into the industry. Hence, for a student to consistently deliver a quality print, managing and controlling color from the input device to a multicolor output device is a major concern for the graphics and imaging educator. Analyzing the color image by examining its quantitative attributes eliminates the subjective judgment on color quality evaluation of printed colors or colors in nature. The quality of digital color printing is determined by these influential factors: screening method applied, type of printing process, ink (dry-toner or liquid-toner), and the substrate (paper). For this research, only the color attributes, such as: hue, gray balance, and overall color deviations will be analyzed to examine the significant differences that exist in the two digital printing processes, as these are the attributes which are monitored and managed for quality accuracy during the printing. Printed colorimetry of these two printing processes will be compared against ISO 12647-7 digital printing standards colorimetry to determine the color quality deviation or tolerances. The purpose of this experimental study is to determine the significant differences that exist among the printed primary colors hue (AH ) deviation [Cyan, Magenta, Yellow, and Black (CMYK)], overall average (AE) color (CMYKRGB) deviation and gray hue (overlap of CMY) deviation (AH) of the two printing processes, namely: Color Electro-photographic and Inkjet. The experiment will be conducted in a color managed digital printing workflow (CMDPW) to determine the significant differences that exist in the color quality of electro-photographic vs. inkjet printing, based on the colorimetric and statistical evaluation among two different types of printing processes. Each printing process in the experiment will be considered as a group, noted by letter "K" (K = 2). This study will focus on the measurement of color prints, printed on the same type of substrate (80 LBS. gloss coated paper) by using a color electro-photographic (color laser) printer and an inkjet printer. The following one-tailed non-directional multiple hypotheses are established for this study, because of the two independent groups of printers (groups, K = 2). A one-tailed non-directional hypothesis predicts the nature of the effect of the independent group on the dependent variable (or the color attribute as the outcome). Note: This manuscript was not received in time for publication in the 2018 TAG A Proceedings.