Printing apparatus

A printing apparatus for applying ink to a printing medium while feeding said printing medium in a predetermined feed direction, thereby to provide a printed sheet, said printing apparatus comprising:

• an ink supply mechanism for individually supplying a desired amount of ink through a plurality of ink transfer mechanisms to a plurality of regions defined on said printing medium to provide said printed sheet, each of said regions extending in said feed direction;
• a density setting element for setting a target printed density for all of said plurality of regions;
• an image reader provided in a feed path of said printed sheet for capturing an image on said printed sheet to obtain captured image data;
• an computation device for processing said captured image data to compute a measured printed density for each of said regions;
• a controller for computing the first amounts of ink supply for said regions, respectively, so that said measured printed density is approximately equal to said target printed density, and for controlling said ink supply mechanism in accordance with said first amounts of ink supply;
• and
• a changing element for changing one of said first amounts of ink supply which corresponds to a selected one of said regions in response to an instruction from an operator to thereby provide the second amount of ink supply;
• and
• a storage element for storing said second amount of ink supply,
• whereby said controller supplies ink to said selected one of said regions in accordance with said second amount of ink supply, and supplies ink to the remainder of said regions in accordance with said first amounts of ink supply.