IMAGE FORMING APPARATUS

To prevent the occurrence of a harmful influence on an image by preventing the rotational fluctuation of a photoconductor drum and an intermediate transfer belt without adding dot toner.SOLUTION: When a pressing force for pressing a developer carrier against an image carrier is F, and the total number of fine particles interposed between a toner particle and the image carrier is N, the relationship between an adhesion force Ft formed between the fine particles and the toner particle measured when the fine particles are pressed against the toner particle with F/N being a pressing force per unit fine particle and an adhesion force Fdr formed between the fine particles and the image carrier measured when the fine particles are pressed against the image carrier with F/N satisfies Ft≤Fdr. The moving speed of a surface of the image carrier and the moving speed of a surface of an intermediate transfer body have a speed difference therebetween.SELECTED DRAWING: Figure 4 【課題】 ドットトナーを付加することなく、感光ドラムや中間転写ベルトの回転変動を抑制することで、画像弊害の発生を抑制する。【解決手段】 現像剤担持体を像担持体に押圧する押圧力をＦ、トナー粒子と像担持体との間に介在する微粒子の総数をＮ、とした場合に、微粒子を単位微粒子当たりの押圧力であるＦ／Ｎでトナー粒子に押圧した際に測定される微粒子とトナー粒子との間に形成される付着力Ｆｔと、微粒子をＦ／Ｎで像担持体に押圧した際に測定される微粒子と像担持体との間に形成される付着力Ｆｄｒと、の関係が、Ｆｔ≦Ｆｄｒを満たし、像担持体の表面の移動速度と中間転写体の表面の移動速度と、の間に速度差を有する。【選択図】 図４