Patent ID: 6994026
Filing Date: 2006-02-07
Classification: G03F

Abstract:
1. A method for the preparation of a flexographic printing plate involving the following steps, in order,: (1) preparing an ink jet recording material comprising (i) a transparent support having front and back sides, and (ii) at the front side a layer assemblage of at least two ink receiving layers, comprising a binder, a cationic mordant in at least one of these layers, and a spacing agent in the top layer of said assemblage, (2) jetting information-wise, according to digitally stored data, droplets of an UV-absorbing dye based ink onto the front side of said ink jet recording material by means of an ink jet printer, thus forming a screened printed ink jet image, (3) flood exposing by actinic light a flexographic printing plate precursor through a master consisting of the ink jet image obtained by steps (1) and (2), (4) developing the exposed flexographic printing plate precursor into a flexographic printing plate wherein said transparent support is a polyethylene terephthalate support carrying on its front side a latex subbing layer and a gelatin subbing layer, and on its back side a latex subbing layer and an electroconductive outer backing layer.