Image forming apparatus with controller to reduce attachment of development agent to transfer roller

An image forming apparatus comprising:

• an image bearer configured to bear a latent electrostatic image thereon;
• a developing device configured to supply a development agent to the latent electrostatic image to obtain a visible image;
• a transfer roller configured to contact the image bearer to transfer the visible image to a recording medium;
• a replenishing device configured to replenish the developing device with the development agent when a density value read from a density detection pattern formed on the image bearer by the developing device is equal to or less than a threshold;
• a processing device configured to conduct a predetermined processing to reduce attachment of the development agent to the transfer roller;
• and
• a control device configured to control a number of times the predetermined processing is performed or processing time in performing the predetermined processing for the processing device, based on whether there is replenishment of the development agent to the developing device by the replenishing device.