Security document

Printed matter – Calendar

Patent

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283 58, B42D 1500

Patent

active

041869443

ABSTRACT:
A method of printing wherein magnetic particles dispersed in an ink are selectively orientated prior to printing onto a document where the particles are aligned on a carrier while the ink is in a low viscous state and the printing is effected when the ink is in a high viscous state. The method by which the viscosity is changed is the selective application of heat.

REFERENCES:
patent: 3245534 (1966-04-01), Smith et al.
patent: 3280974 (1966-10-01), Riddle et al.
patent: 3878367 (1975-04-01), Fayling et al.

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