Printing control apparatus and printing control method

A printing control apparatus configured to control a printing apparatus including a first nozzle array having ejection ports configured to eject an ink of a predetermined color and arranged in a sub scanning direction and a second nozzle array having ejection ports configured to eject an ink of the predetermined color and arranged in the sub scanning direction, the printing apparatus printing an image in a predetermined region on a print medium by scanning the first nozzle array and the second nozzle array N times (where N is an integer of 2 or greater) in a main scanning direction intersecting with the sub scanning direction, the printing control apparatus comprising:

• a control unit configured to perform control so that a distribution ratio based on which color separation data separated as having the predetermined color is distributed into data for the first nozzle array and a distribution ratio based on which the color separation data is distributed into data for the second nozzle array are different depending on a tone value in the color separation data;
• and
• a generation unit configured to generate printing data to be used for printing by the first nozzle array based on the distributed data for the first nozzle array and generate printing data to be used for printing by the second nozzle array based on the distributed data for the second nozzle array.