Patent ID: 7891293

Claim:
A gravure printing process comprising: applying a low-viscosity printing ink having a proportion of not less than 35% by weight, based on the total weight of the ready-to-print printing ink, of volatile solvent(s), wherein said printing ink is pigmented with at least one flake-form effect pigment onto a print substrate by contacting said print substrate with at least one printing form having recesses filled with said printing ink, wherein said at least one printing form comprises a flat or cylindrical body with a metallic or ceramic coating having recesses in the form of individual cells produced by laser engraving, wherein at least some of the cells on the metallic or ceramic coating of the printing form are arranged in groups, wherein the arrangement of cells on the metallic or ceramic coating of the printing form into groups comprises: (a) at least one group consisting of six or seven cells which cells are arranged closely alongside one another without the outer edges of the cells touching one another, and where the separation of the cells in said at least one group from one another is smaller than the separation of each of the cells in said at least one group from an adjacent cell outside said at least one group, and wherein the cells of said at least one group are arranged in a hexagonal shape; and/or (b) at least one group consisting of six or seven cells which cells are arranged alongside one another in such a way that the outer edges of in each case at least two of the cells in the group touch at least one point, and wherein none of the outer edges of the cells in the group touch an adjacent cell outside the group, and wherein the cells of said at least one group are arranged in a hexagonal shape; and/or (c) at least one group consisting of six or seven cells which cells arranged in such a way that they partly overlap, and wherein none of the cells in the group touches an adjacent cell outside the group, and wherein the cells of said at least one group are arranged in a hexagonal shape.