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摘要

PROBLEM TO BE SOLVED: To provide an image forming method by which an image of high quality with enough image density, high resolution without an edge effect can be obtd. for a long time. SOLUTION: By this method, a developer is carried by a developer carrying body having a magnet inside to a developing main pole, where an electrostatic image on an electrostatic charge image carrying body is visualized by a developing bias. In this method, a developer containing (1) a carrier coated with a resin selected from among a silicone resin, vinyl polymers and fluorocarbon resin and (2) a toner described below is used while controlling the average magnetic force Gmax between two magnetic poles to 600 to 1200 Gauss and controlling the min magnetic force Gmin between the poles satisfying 1.255=Gmax/Gmin=5. The carrier has 30 to 100 μm weight average size, 10 to 70 emu/g magnetization δs at 1,000 Oe and =10% ratio of δr/δs, wherein δr is the residual magnetization. The toner has 4 to 13 μm weight average particle size and =27.5 variance in the volume average particle size.