Inkjet printing apparatus and inkjet printing method

An inkjet printing apparatus comprising:

• a conveyance device which conveys paper by suctioning, the conveyance device conveying the paper by suctioning the paper from leading end thereof;
• an inkjet head which ejects droplets of colored ink onto the paper conveyed by the conveyance device so as to form an image on the paper;
• a transparent liquid deposition device which deposits a transparent liquid only onto a blank background portion of the paper conveyed by the conveyance device, the blank background portion being a region where the colored ink is not ejected;
• a transparent liquid deposition volume determination device which determines deposition volume of the transparent liquid to be deposited onto the paper based on information indicating whether rear-side printing to the paper is carried out or not;
• and
• a transparent liquid deposition control device which controls the transparent liquid deposition device in such a manner that the transparent liquid with the deposition volume determined by the transparent liquid deposition volume determination device is deposited onto the blank background portion of the paper,
• wherein the information indicates that front-side printing in carrying out double-side printing is regarded as printing only to single side in a case that rear-side printing is to be carried out, and that rear-side printing in carrying out double-side printing is regarded as printing in a case that rear-side printing is not to be carried out, and
• wherein the transparent liquid deposition volume determination device sets a maximum deposition volume of the transparent liquid by the transparent liquid deposition device for the case that the rear side printing is to be carried out, and sets deposition volume of the transparent liquid, less than the deposition volume of the transparent liquid for the case that the rear side printing is to be carried out, by a predetermined amount, for the case that the rear-side printing is not to be carried out.