Printing method with oxidative-drying intaglio ink and UV-VIS-curable intaglio inks

Process for printing a security element on at least one side of a substrate with two or more different intaglio inks wherein at least one of said two or more different intaglio inks is an oxidative drying intaglio ink curable by an oxidative process, at least one other of said two or more different intaglio inks is a UV-VIS-curable intaglio ink curable by UV-VIS irradiation, the process comprising:

• transferring the oxidative drying intaglio ink through rubber-made rollers,
• inking a first selected portion of a printing plate of said intaglio printing device with the oxidative drying intaglio ink,
• transferring the UV-VIS-curable intaglio ink through EPDM (ethylene propylene diene monomer) material-made rollers,
• inking a second selected portion of said printing plate, which does not overlap with said first selected portion, of said intaglio printing device with the UV-VIS-curable intaglio ink,
• wiping off the excess of the oxidative drying intaglio ink and the UV-VIS-curable intaglio ink from said intaglio printing device using a paper or a tissue wiping system,
• printing the oxidative dying intaglio ink onto a first area of the substrate corresponding to the first selected portion of the printing plate and the UV-VIS-curable intaglio ink onto a second area of the substrate corresponding to the second selected portion of the printing plate in one printing step using one intaglio printing device, wherein intaglio relief of the second area has a predetermined thickness larger than intaglio relief of the first area,
• curing the UV-VIS curable intaglio ink by exposure to the UV-VIS irradiation, and
• curing the oxidative drying intaglio ink by the oxidative process,
• wherein said UV-VIS-curable intaglio ink is a transparent and colorless ink,
• wherein the printed cured ink layer made from said UV-VIS-curable intaglio ink is thicker than the printed cured ink layer made from said oxidative drying intaglio ink.