Patent ID: 8310707

Claim:
An image forming device comprising: a recording medium feeding mechanism unit configured to feed a recording medium for printing, the recording medium including a front side and a back side; a data receiving unit configured to receive image data including a high-density printing order; a judging unit in communication with the data receiving unit and configured to judge whether or not to perform high-density printing based on the image data received from the data receiving unit; a specified area extracting unit in communication with the judging unit and configured to extract a specified area from the image data when the judging unit judges that the high-density printing should be performed; a printing data creating unit in communication with the specified area extracting unit and configured to create first printing data obtained from the specified area extracted by the specified area extracting unit and second printing data obtained from the image data; a printing data memory unit in communication with the printing data creating unit and configured to store the first printing data and the second printing data created at the printing data creating unit; an image forming unit in communication with the printing data memory unit and configured to print the stored first printing data and the stored second printing data on the front side of the recording medium; and a recording medium re-feeding mechanism unit configured to re-feed the recording medium to the image forming unit to enable the image forming unit to over-print one of the first printing data and the second printing data on the front side of the recording medium at the image forming unit, wherein at least a portion of the second printing data is repeated in the first printing data, and the high-density printing is performed by the image forming unit re-printing at least the portion of the second printing data that is repeated in the first printing data to form a high-density area with a higher density than printing data that is in the first printing data but not the second printing data.