Patent ID: 8750739

Claim:
An image forming apparatus comprising: an image forming device configured to form an unfixed toner image on a recording paper; and a fixing device configured to fix the unfixed toner image onto the recording material in a fixing nip by heat and pressure; wherein in an image forming process of said image forming device, 0<B<ρπL/(30×3 1/2 ) is satisfied, where L (μm) is a volume average particle size of toner of the unfixed toner image, ρ (g/cm^3) is a density of the toner, and B (mg/cm^2) is a maximum toner deposition amount, per unit area, on a predetermined recording paper, wherein said fixing device fixes the toner image while satisfying the conditions that, at an outlet of said fixing nip, the viscosity of a toner layer contacting said fixing device is not higher than 1500 (Pa·s), and the viscosity of a toner layer contacting the recording paper is not lower than 3000 (Pa·s).