Image forming method and image forming apparatus

An image forming apparatus comprising:

• a latent-image bearing member for bearing an electrostatic latent image;
• a charging device, comprising conductive magnetic particles, a rotatable conductive-magnetic-particle carrying member for carrying and conveying the conductive magnetic particles, and a plurality of magnetic-field generation means provided within the conductive-magnetic-particle carrying member, for charging said latent-image bearing member, said charging device charging a surface of said latent-image bearing member by applying a voltage to the conductive-magnetic-particle carrying member and causing the conductive magnetic particles to contact said latent-image bearing member;
• latent-image forming means for forming the electrostatic latent image on the charged surface of said latent-image bearing member;
• and
• a developing device, facing said latent-image bearing member and comprising a two-component developer comprising a toner and magnetic carrier particles, a developer carrying member for carrying the two-component developer, and a plurality of magnetic-field generation means provided within the developer carrying member, for forming a toner image by developing the electrostatic latent image, said developing device forming an electric field at a portion where said latent-image bearing member faces the developer carrying member and developing the electrostatic latent image by the toner of the two-component developer,
• wherein an amount of frictional charging (Q1) of the toner with the conductive magnetic particles and an amount of frictional charging (Q2) of the toner with the magnetic carrier particles within said developing device satisfy the following relationship:
• 0<Q2≦Q1 (mC/kg), or 0>Q2≧Q1 (mC/kg).