Process cartridge and image forming apparatus

A process cartridge for use in an image forming apparatus, comprising:

• an image bearing member configured to be rotatable and have a circumferential surface on which a latent image is formed;
• a developing unit storing a developing agent, the developing unit configured to supply the developing agent to the image bearing member in order to develop the latent image on the image bearing member;
• and
• a cleaning member configured to contact the circumferential surface of the image bearing member and clean the circumferential surface,
• wherein
• the developing agent stored in the developing unit contains a toner including toner particles and a metal soap,
• the image bearing member includes a plurality of grooves formed on the circumferential surface so as to extend in a circumferential direction of the circumferential surface and to be arranged side by side in a rotation axis direction, the plurality of grooves and portions between the grooves forming concave-convex portions on the circumferential surface, and
• the circumferential surface of the image bearing member has a ten-point average surface roughness Rz of 0<Rz≤0.70 μm and an average interval Sm between concave-convex portions on the circumferential surface of 0<Sm≤70.0 μm, and
• an average particle diameter of the metal soap is larger than the ten-point average surface roughness Rz,
• wherein the toner particles include an organosilicon polymer covering the surface of the toner particles,
• wherein when the ratio of the amount of silicon in the toner particles after washing with aqueous solution of neutral detergent to the amount of silicon in the toner particles before washing with the aqueous solution of neutral detergent is defined as an adhesion ratio, the adhesion ratio of the organosilicon polymer on the surface of each of the toner particles is 90% or more.