Importance

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Abstract

It is sought to allow a control unit part to be made up simply and at low cost, to prevent oozing out at an edge portion of a printing image and to enable inkjet printing at high quality regardless of kinds of the recording medium.To this end, there is provided a method of applying an undercoat in an ink jet recording apparatus of line type for printing recorded information, including an ink jet type undercoating unit for prior undercoating on a recorded information printing portion wherein undercoating data are prepared by software manipulation on the basis of printing information recorded data, characterized in that it comprises: laying a mask beneath a layer of a printing image and detecting an edge of the printing image; and on the basis of a mask information having the printing image extracted by software manipulation, applying an undercoat to an area covering from the printing image to an outer side of an edge portion of the printing image.

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First Claim