I. Introduction
Conventional print paper is a complex material in terms of both its structure and its composition. In its basic form, it is an interpenetrating network of cellulose fibers with a significant amount of free volume occupied by air. It sometimes contains a significant amount of fillers to enhance its mechanical strength as well as to allow optimization of optical features including whiteness and reflectivity. When used in a copying process, its electrostatic and electrical properties are important in the charge transfer process itself. They are equally important for understanding the paper as a practical dielectric insulator.