Abstract: The electrophotographic photosensitive member includes a support and a photosensitive layer on the support, in which a surface layer of the electrophotographic photosensitive member contains a particle, the surface layer has a particle partially exposed from the surface layer among the particle contained in the surface layer, the particle has a volume average particle diameter of 50.0 nm or more and 350.0 nm or less; in a cross-section of the surface layer, the number of the particle partially exposed from the surface layer is 80% by number or more based on a total number of the particle contained in the surface layer; and a total volume of an exposed portion of the particle partially exposed from the surface layer is 30% by volume or more and 80% by volume or less based on an entire volume of the particle contained in the surface layer.

Abstract: Provided is an electrophotographic photosensitive member that achieves satisfactory transferability. An electrophotographic photosensitive member including a charge generating layer, a charge transporting layer, and a protection layer laminated on a support in the stated order, wherein the protection layer contains a binder resin and particles, and wherein when an average thickness of the protection layer in a site free of the particles is represented by T and a volume-average particle diameter of the particles is represented by Dm in a cross-section of the protection layer, the following formula (a) is satisfied.

Abstract: A packaging structure for packaging roll-shaped materials wound on a core, comprises: a bottom plate; left and right supporting plates to support both end portions of the core from a bottom side of the core; front and rear holding plates to support the left and right supporting plates from front and rear sides of the left and right supporting plates so as to hold a stand-up condition that the left and right supporting plates stand on the bottom plate; and a supporting structure to make the bottom plate, the left and right supporting plates and the front and rear holding plates in a single body structure and to make the left and right supporting plates and the front and rear holding plates collapsible.