Patent ID: 8750742

Claim:
An image forming apparatus comprising: an image forming unit configured to form a first image on a first side of a recording medium and a second image on a second side of the recording medium opposite to the first side; a fixing unit configured to fix the first and second images onto the first and second sides of the recording medium by heat; a re-feeding unit configured to feed the recording medium having the first image fixed onto the first side by the fixing unit back to the image forming unit such that the second image is formable on the second side; a humidity detector configured to detect a humidity around or inside the image forming apparatus; and a controller configured to change an image formation area on the second side of the recording medium when the humidity detected by the humidity detector is greater than or equal to a specified humidity, wherein the second image is to be formed in the image formation area on the second side of the recording medium, wherein changing the image formation area on the second side of the recording medium includes increasing a size of a non-image formation area where no image is to be formed, and wherein the non-image formation area is provided at a trailing end of the second side of the recording medium in a direction in which the recording medium is fed.