The development of positive charging multi-layered OPC drum for liquid electrophotographic (LEP) process is presented in this study. This includes a) the investigation of optimum CGL solvents to coat CGL on CTL, b) the formula optimization of CTL and CGL to get high sensitivity and low discharge voltage, and c) OCL material development using aqueous dispersion of polyurethane to achieve the resistance against carrier liquid. Using the proprietary positive charging multi-layered OPC drum and liquid toner, excellent full color image could be obtained.
Nam-Jeong Lee, Hae-Ree Joo, Kyung-Yol Yon, Young No, "Development of Positive Charging Multi-Layered Organic Photoconductor for Liquid Electrophotographic Process" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP19), 2003, pp 670 - 673, https://doi.org/10.2352/ISSN.2169-4451.2003.19.1.art00055_2