Image-forming apparatus and image-forming method

An image-forming method comprising:

• using an image-forming apparatus including an electrophotographic photosensitive member including a conductive base and a single-layer photosensitive layer disposed on the conductive base, the single-layer photosensitive layer including a binder resin, a charge-generating material, a hole-transporting material, and an electron-transporting material, and a developing unit including a developing roller that develops an electrostatic latent image formed on a surface of the electrophotographic photosensitive member with a developer including a toner in order to form a toner image, the developing roller being arranged to come into contact with the photosensitive layer,
• developing an electrostatic latent image formed on the surface of the electrophotographic photosensitive member with a developer including a toner in order to form a toner image,
• wherein the ratio R/P of the content R [mass %] of the binder resin in the photosensitive layer to the pressing force P [N/mm] at which the developing roller is pressed against the photosensitive layer is 11.5 or more and 19.6 or less, and
• the content R of the binder resin is 45% by mass or more.