Abstract: A wiping device is equipped with a wiping blade that wipes an ink ejection surface of a nozzle row of an ink jet head, a cleansing tank that stores a cleansing solution and in which the wiping blade is immersed, and a shower unit that sprays the cleansing solution onto the wiping blade.

Abstract: A wiping device is equipped with a wiping blade that wipes an ink ejection surface of a nozzle row of an ink jet head, a cleansing tank that stores a cleansing solution and in which the wiping blade is immersed, and a shower unit that sprays the cleansing solution onto the wiping blade.

Abstract: The ink jet printing apparatus includes: an ink jet head having a nozzle row in which a plurality of nozzles for ejecting ink are arranged and a nozzle guard with an opening at a portion corresponding to the nozzle row, provided at a position via a gap with respect to an ink ejection surface of the nozzle row; a sheet shaped absorbing member having a size that covers a range of the opening of the nozzle guard; and a capping unit that presses the absorbing member onto the opening of the nozzle guard.

Abstract: The ink jet printing apparatus includes: an ink jet head having a nozzle row in which a plurality of nozzles for ejecting ink are arranged and a nozzle guard with an opening at a portion corresponding to the nozzle row, provided at a position via a gap with respect to an ink ejection surface of the nozzle row; a sheet shaped absorbing member having a size that covers a range of the opening of the nozzle guard; and a capping unit that presses the absorbing member onto the opening of the nozzle guard.

Abstract: Pre-treatment solutions are provided, which can improve printing density and prevent bleeding and strike through when printing, particularly inkjet printing is performed with an oil ink on a printing medium that has been treated with the pre-treatment solutions. The pre-treatment-solution can be selected from the following (I), (II) and (III): (I): a pre-treatment solution which comprises at least inorganic particles with an average particle diameter of not less than 1 ?m and not more than 20 ?m and a solvent, in which the difference in solubility parameter (SP value) between the solvent of the pre-treatment solution and the solvent of the oil ink is not less than 1.0 (cal/cm3)1/2; (II): a pre-treatment solution which comprises at least inorganic particles with an average particle diameter of not less than 0.1 ?m and less than 1 ?m and a solvent, in which the difference in solubility parameter (SP value) between the solvent of the pre-treatment solution and the solvent of the oil ink is not less than 2.