Comparative Evaluation of Print-edge Sharpness of Office-Based and Production-Based Electrophotographic Printing Systems

Abstract

Print-edge sharpness is one of the most important indicators of print quality, directly influencing the visual appearance, readability and reproduction accuracy of printed images and text. This paper presents a comparative evaluation of print-edge sharpness achieved by office-based and production-based electrophotographic printing systems on various paper substrates. Four commercially available paper types, namely uncoated, light-weight coated (LWC), matte coated and gloss coated papers were selected to investigate the influence of substrate characteristics on edge reproduction. Print-edge sharpness was evaluated for three image elements: line drawing edges, midtone edges and solid edges. The sharpness values were measured using human standard observer method and the performance of both printing systems was compared.

The comparative analysis reveals that the type of electrophotographic printing system and the surface characteristics of the printing substrate play a crucial role in determining print-edge sharpness. Coated papers, particularly gloss coated paper, provide significantly better edge definition than uncoated paper due to their smoother and less porous surfaces, which facilitate accurate toner deposition and fusing. The findings suggest that production-based electrophotographic presses are more suitable for high-quality commercial printing applications requiring superior image sharpness and consistency, whereas office-based presses are appropriate for routine office and short-run printing where moderate print quality is acceptable. This study provides valuable insights for selecting appropriate printing systems and substrates to achieve optimum print-edge quality in digital electrophotographic printing.