CARRIER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, ELECTROSTATIC CHARGE IMAGE DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

To provide a carrier for electrostatic charge image development that prevents a change with time in image density.SOLUTION: A carrier for electrostatic charge image development has a magnetic particle and a coating resin layer that covers the magnetic particle. After the carrier is dispersed in water and subjected to ultrasonic irradiation, the amount of the coating resin layer peeled off from the magnetic particle is 800 mass ppm or more and 2000 mass ppm or less based on the coating amount of the coating resin layer before the ultrasonic irradiation. The difference between an initial coating amount of the coating resin layer of a carrier without a travel history and the coating amount of the coating resin layer of the carrier extracted from an electrostatic charge image developer with a travel history is 0 mass ppm or more and 3000 mass ppm or less based on the initial coating amount of the coating resin layer.SELECTED DRAWING: None 【課題】経時での画像濃度変動を抑制する静電荷像現像用キャリアを提供すること。【解決手段】磁性粒子と、前記磁性粒子を被覆する被覆樹脂層と、を有し、キャリアを水中に分散して、超音波照射した後に、前記磁性粒子から剥がれる前記被覆樹脂層の量が、前記超音波照射前の前記被覆樹脂層の被覆量に対して８００質量ｐｐｍ以上２０００質量ｐｐｍ以下であり、走行履歴のないキャリアの前記被覆樹脂層の初期被覆量と走行履歴のある静電荷像現像剤から取り出したキャリアの前記被覆樹脂層の被覆量との差分が、前記被覆樹脂層の初期被覆量に対して０質量ｐｐｍ以上３０００質量ｐｐｍ以下である静電荷像現像用キャリア。【選択図】なし