Ink jet printing apparatus and ink jet printing method

An ink jet printing apparatus, comprising:

• a controller that can execute a high speed absorption paper printing mode for use with a high speed absorption paper, which contains substantially no sizing agent but contains alumina particles or which has a permeability of 5 ml m−2 msec−1/2 or more as a Ka value in a case of using ink having a permeation property of 1 ml m−2 msec−1/2 or less as a Ka value for PPC paper, and an ordinary paper printing mode for use with ordinary paper, respectively, as the printing mode,
• wherein an ink ejection amount per one pixel for the high speed absorption paper printing mode is less than that for the ordinary paper printing mode.

An ink jet printing apparatus, wherein an ink ejection amount per one pixel is 2.8×10−3 pl/μm2−8.4×10−3 pl/μm2 onto a printing medium having a permeability of 5 ml m−2 msec−1/2 or more as a Ka value in a case of using ink having a permeation property of 1 ml m−2 msec−1/2 or less as a Ka value for PPC paper.

An ink jet printing apparatus that performs printing by ejecting ink to a printing medium,

• wherein an ink ejection amount per one pixel is 2.8×10−3 pl/μm2−8.4×10−3 pl/μm2 onto a printing medium that contains substantially no sizing agent but contains alumina particles.

An ink jet printing method, which performs printing by executing relative movement of a printing head to a printing medium and ejecting at least ink from the printing head during the relative movement, performing printing in a printing mode selected from a plurality of printing modes which correspond to different printing mediums and have different relative movement speeds of the printing head to the printing medium, respectively, said method comprising the step of:

• controlling the printing head to execute ejection in a manner that for a printing mode having a high relative movement speed, an ink ejection amount per one pixel is made smaller than that in a printing mode having a lower relative movement speed than the high relative movement speed, and that for the printing mode having the high relative movement speed, ink and a processing liquid that makes the ink insoluble are ejected.

An ink jet printing method, comprising:

• a printing step for executing a high speed absorption paper printing mode for use with a high speed absorption paper, which contains substantially no sizing agent but contains alumina particles or which has a permeability of 5 ml m−2 msec−1/2 or more as a Ka value in a case of using ink having a permeation property of 1 ml m−2 msec−1/2 or less as a Ka value for PPC paper, and an ordinary paper printing mode for use with ordinary paper, respectively, as the printing mode,
• wherein an ink ejection amount per one pixel for the high speed absorption paper printing mode is less than that for the ordinary paper printing mode.

An ink jet printing method,

• wherein an ink ejection amount per one pixel is 2.8×10−3 pl/μm2−8.4×10−3 pl/μm2 onto a printing medium having a permeability of 5 ml m−2 msec−1/2 or more as a Ka value in a case of using ink having a permeation property of 1 ml m−2 msec−1/2 or less as a Ka value for PPC paper.

An ink jet printing method that performs printing by ejecting ink to a printing medium,

• wherein an ink ejection amount per one pixel is 2.8×10−3 pl/μm2−8.4×10−3 pl/μm2 onto the printing medium that contains substantially no sizing agent but contains alumina particles.