Patent ID: 6084621
Filing Date: 2000-07-04
Classification: B41J,B41M

Abstract:
An ink jet printing method, comprising the steps of:applying to a print material a substantially colorless liquid containing a substance that makes colorant of ink insoluble or coagulate to form an invisible latent image on the print material based on image data;applying the ink to at least a part of the latent image formed on the print material and to at least a part of the print material other than where the latent image is formed; andremoving only the part of the ink applied in the ink application step to the print material which is not insoluble or coagulated and is other than ink made insoluble or coagulated by the substance contained in the liquid that makes the colorant of the ink insoluble or coagulate and thereby revealing in an image form the latent image so that the latent image is made visible on the print material,wherein the ink is a water-soluble ink and wherein said ink removing step is performed by exposing the printing material to running water or standing water.