Patent ID: 6367922
Filing Date: 2002-04-09
Classification: B41M,C09D

Abstract:
An ink jet printing process for improving the water-fastness of an ink jet image comprising the following steps in order:a) providing an ink jet recording element comprising a support having thereon an image-recording layer comprising a cross-linkable binder of gelatin or acetoacetylated poly(vinyl alcohol) and a mordant; b) applying liquid ink droplets of an anionic, water-soluble dye on said image-recording layer in an image-wise manner; and c) applying an aqueous solution of a hardener to said image to cross-link said binder, said hardener being selected from the group consisting of formaldehyde and compounds that contain two or more aldehyde functional groups, blocked hardeners, active olefinic compounds having two or more olefinic bonds, and compounds that contain two or more amino groups.