| abstract |
Provided are a developing device, a process cartridge, and an image forming apparatus in which image density is maintained even when an outer diameter of a developer carrying member is 12 mm or less, and fog and density unevenness are suppressed to an allowable level or less. An outer diameter of the developer carrying member 41 is more than 8 mm, it is 12mm or less, a magnetic one-component developer, 1000 saturation magnetization upon the addition of a magnetic field oersteds, 20 Am 2 / kg or more, 37Am 2 / The magnetization when the magnetic field is lowered to 700 Oersteds is 70% or more and 80% or less of the saturation magnetization, and the magnetization when the magnetic field is lowered to 500 Oersteds is 50% or more and 62% or less of the saturation magnetization. The average circularity is 0.960 or more. [Selection] Figure 1 |