Gravure process for printing adjacent color surfaces with various color coating thicknesses
AssigneeGiesecke & Devrient GmbH
InventorsKarlheinz Mayer, Roger Adamczyk, Eduard Wisjak, Peter Franz
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Abstract
A data medium having a printed image is created by the intaglio printing process. The printed image has at least one first ink area with a first ink layer thickness and at least one second ink area with a second ink layer thickness adjacent to the first ink area, such that the ink layer thicknesses are different. The first and second ink areas are separated by a sharp border line invisible on examination with the naked eye, and the ink layer thickness of both ink areas passes through a minimum in the region of the border line.
Claims18
A printing plate for the printing of adjacent ink areas, comprising a generally planar printing plate surface and engraved in the printing plate surface, at least one first engraving area with a first engraving depth and at least one second engraving area with a second engraving depth adjacent to the first engraving area, such that the engraving, depths are different, and wherein, between the first and the second engraved areas, is arranged a separating edge the upper edge of which extends up to a point substantially at the level of the printing plate surface.
A process for the manufacture of a printing plate for the printing of adjacent ink areas with different ink layer thicknesses, comprising the following steps:
- providing a printing plate with a generally planar printing plate surface;
- and
- engraving a first engraving area with a first engraving depth and a second engraving area with a second engraving depth in the printing plate surface, such that between the first engraving area and the second engraving area, a separating edge remains, said separating edge having an upper edge which extends up to a point substantially at the height of the printing plate surface.
Dependencies are inferred from the claim text.