Image Forming Apparatus, Image Forming System, and Non-Transitory Recording Medium Storing a Computer Readable Program

An image forming apparatus includes an image generating unit for generating a job image, a color verification image generating unit, a color converting unit for performing the same color conversion on the job image and the color verification image, a printing unit for printing the job image and the color verification image subjected to the color conversion, a colorimetry device for measuring the colors of a printout of the color verification image, a storage unit, a storing control unit for storing the job image in the storage unit in association with the color verification image and colorimetrical values thereof, and a reprinting control unit, wherein the printing unit performs a test print of the stored color verification image before reprinting, and the reprinting control unit compares colorimetrical values obtained during the test print with stored past colorimetrical values and outputs color differences.