US 11,807,029 B2
Method for producing an optically variable security element
Andreas Rauch, Ohlstadt (DE); Tobias Sattler, Holzkirchen (DE); and Winfried Hoffmuller, Bad Tolz (DE)
Assigned to GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
Appl. No. 17/615,796
Filed by GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
PCT Filed May 29, 2020, PCT No. PCT/EP2020/025253
§ 371(c)(1), (2) Date Dec. 1, 2021,
PCT Pub. No. WO2020/244806, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 10 2019 003 947.5 (DE), filed on Jun. 6, 2019.
Prior Publication US 2022/0314681 A1, Oct. 6, 2022
Int. Cl. B42D 25/324 (2014.01); B42D 25/373 (2014.01); B42D 25/425 (2014.01); B42D 25/445 (2014.01)
CPC B42D 25/324 (2014.10) [B42D 25/373 (2014.10); B42D 25/425 (2014.10); B42D 25/445 (2014.10)] 15 Claims
OG exemplary drawing
 
1. A method for manufacturing an optically variable security element, in which a carrier is made available, the area extension of which defines a z axis standing perpendicularly thereon, wherein:
(A1) a first embossing lacquer layer is applied to the carrier in an area region,
(P1) a first relief structure is embossed into the first embossing lacquer layer,
(A2) a second, dyed embossing lacquer layer is applied to the first embossing lacquer layer,
wherein a color effect of the second embossing lacquer layer differs from a color effect of the first embossing lacquer layer, and
wherein the first relief structure is partially covered by the second, dyed embossing lacquer layer and is partially not covered,
(P2) into the second embossing lacquer layer there is embossed a second relief structure, which differs from the first relief structure, so that the first relief structure and the second relief structure in the z-direction are arranged at different height levels with reference to the carrier, and
(M) a coating is applied to a non-covered portion of the first relief structure and to the second relief structure,
so that for a viewer of the security element
a first color impression is created through the combination of at least the color effects of the first embossing lacquer layer and the coating, and
a second, different color impression is created through the combination of the color effects of at least the first embossing lacquer layer, the second embossing lacquer layer and the coating,
wherein the coating is supplied with recesses after step (M), by either
before step (M) printing a washing ink onto the first and/or second embossing lacquer layer and washing out the washing ink together with the coating after step (M), or
after step (M) applying a resist lacquer to the coating and removing the coating in the regions not supplied with resist by an etching step.