Patent ID: 7903283
Filing Date: 2011-03-08
Classification: B41J,H04N

Abstract:
1. An image forming method using an ink-jet printing device which forms a dot on a recording medium by ejecting a drop of recording liquid, the image forming method comprising the steps of: forming an image in which a ground tint is embedded in one of a foreground part and a background part of an original image, the ground tint indicating that copying of the original image is inhibited; and making an adhesion area of the dots of the recording liquid per unit area of the recording medium in the foreground part different from an adhesion area of the dots of the recording liquid per unit area of the recording medium in the background part, wherein a first plurality of adjoining dots constitute a background of the ground tint, and wherein a foreground part of the ground tint is constituted by a second plurality of adjoining dots arranged at intervals of a predetermined distance or, if a pitch between adjoining dots is large, a third plurality of adjoining dots formed by ejecting a plurality of drops of the recording liquid to a same location on the recording medium.