Patent ID: 7237861

Claim:
An inkjet printer comprising: at least one special color head to jet a special color ink as a background color; a plurality of process color heads to jet respective process color inks; and a controller to control operations of the special color head and the plurality of process color heads; wherein the controller selectively controls the inkjet printer to conduct: (i) a top face printing, when printing on an obverse side of a recording medium, in which at least one of the plurality of the process color heads jets the respective process color ink after the special color head jets the special color ink on the obverse side of a recording medium, and (ii) a bottom face printing, when printing on an underside of a transparent or translucent recording medium, in which the special color head jets the special color ink after at least one of the plurality of the process color heads jets the respective process color ink on the underside of the transparent or translucent recording medium.