| 摘要 |
<p>An image forming apparatus including: an image bearing member having a photoconductive layer of a capacitance per unit area of 1.7 7 × 10 -6 (F/m 2 ) or more; and a developing device having a developer carrying member to which development voltage is applied for developing a latent image to form a toner image on the image bearing member, wherein the following Expression is satisfied: Q M ‰¥ 0.95 × Vcont M S × L t 2 �¢ µ 0 �¢ µ t + Ld µ 0 �¢ µ d where Q/M (C/g): an electric charge quantity per unit weight of the toner image, Vcont: a potential difference between a surface potential of the image bearing member and a direct current component of the development voltage, M/S (g/m 2 ): a toner weight per unit area of the maximum density portion, L t (m): a toner layer thickness in the maximum density portion, L d (m): a photoconductive layer thickness, µ t : a relative permittivity of the toner layer, µ d : a relative permittivity of the photoconductive layer, and µ 0 (F/m): a vacuum permittivity.</p> |
