| 摘要 |
An image forming method includes forming a first electrostatic image on an image bearing member; developing with developer carried on a developer carrying member the first image formed in the first image forming step; forming a second electrostatic image on the image bearing member carrying the first developed image formed in the first developing step; and developing with developer carried on a developer carrying member, the electrostatic image formed in the second electrostatic image forming step; wherein during the second developing step, an alternating electric field is generated between the developer carrying member and the image bearing member, and a time period T(1-2) necessary for the electric field to shift from a peak value V1 of a transfer portion, which transfers developer to the image bearing member, to a peak value V2 of a back-transfer portion, which transfers developer back from the image bearing member to the developer carrying member, is larger than a time period T(2-1) necessary for the electric field to shift from V2 to V1.
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