Image forming apparatus

An image forming apparatus configured to form an image on a recording material, the image forming apparatus comprising:

• a rotatable image bearing member;
• a charging unit configured to charge the image bearing member;
• an exposure unit configured to expose the charged image bearing member to form an electrostatic latent image;
• a developing unit configured to develop the electrostatic latent image formed on the image bearing member into a toner image at a developing position;
• an intermediate transfer member configured to receive the toner image from the image bearing member and transfer the toner image to the recording material;
• a transfer member configured to form a primary transfer portion for transferring the toner image formed on the image bearing member to the intermediate transfer member and transfer the toner image on the image bearing member to the intermediate transfer member by application of a transfer voltage;
• a detection unit configured to detect a density of an adjustment toner image formed on the image bearing member at a position downstream of the developing position and upstream of the primary transfer portion in a rotation direction of the image bearing member;
• a neutralization unit configured to neutralize a surface of the image bearing member by irradiating light at a position downstream of the primary transfer portion in the rotation direction and upstream of the charging unit in the rotation direction;
• a cleaning unit configured to remove toner on the intermediate transfer member at a position upstream of the primary transfer portion and downstream of a secondary transfer portion for transferring the toner image from the intermediate transfer member to the recording material in a rotation direction of the intermediate transfer member;
• and
• a control unit configured to execute a first mode in which the toner image formed on the image bearing member is transferred to the intermediate transfer member and is transferred from the intermediate transfer member to the recording material and a second mode in which the adjustment toner image is formed on the image bearing member and detected by the detection unit,
• wherein the control unit is configured to apply a transfer voltage having a polarity opposite to a normal charging polarity of the toner to the transfer member at least while the adjustment toner image passes through the primary transfer portion, transfer the adjustment toner image to the intermediate transfer member, and rotate the intermediate transfer member such that the transferred adjustment toner image passes through the cleaning unit, during execution of the second mode.