PROCESSES FOR IN-FIELD HARDENING OF OPTICAL EFFECT LAYERS PRODUCED BY MAGNETIC-FIELD GENERATING DEVICES GENERATING CONCAVE FIELD LINES Russian patent published in 2019 - IPC B42D25/369

Abstract RU 2681767 C2

FIELD: special types of printed products.

SUBSTANCE: invention relates to protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction.

EFFECT: in particular, the invention relates to a method for freezing the orientation of orientable magnetic or magnetisable pigment particles by irradiation hardening the coating layer comprising the orientable magnetic or magnetisable pigment particles through the substrate carrying the coating layer.

21 cl, 11 dwg, 1 tbl

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RU 2 681 767 C2

Authors

Loginov Evgenij

Shmid Mate

Despland Klod-Alen

Dego Per

Dates

2019-03-12—Published

2015-07-09—Filed