Developing agent and image forming apparatus

An image forming apparatus, comprising:

• at least one carrier;
• a developing device housing a toner having toner particles containing a first magnetic powder and a binder resin, 0.5 to 5% by weight based on the total weight of the toner particles of a second magnetic powder, and 0.01 to 0.5% by weight based on the total weight of the toner particles of stearate particles having an average particle diameter of 1 μm to 3 μm, including a developing roller having a hollow cylindrical sleeve arranged rotatable and a magnet roll arranged within the sleeve, rotatable independently of the sleeve and having a plurality of magnetic poles, and serving to develop an electrostatic latent image formed on the image carrier so as to form a developing agent image;
• a transfer device for transferring the developing agent image;
• a cleaning device for cleaning the developing agent that was not transferred;
• and
• a fixing device arranged below the transfer device for fixing the transferred developing agent image.