Safety means, paper and document against falsification by...

Details Safety means, paper and document against falsification by... Safety means, paper and document against falsification by...

B - Operations, Transporting

41

M

117/6

B41M 3/14 (2006.01) B42D 15/00 (2006.01) D21H 21/46 (2006.01)

Patent

CA 1243557

ABSTRACT OF THE DISCLOSURE The paper according to the invention contains a non-fluorescent means against chemical falsification, reacting to the oxidizing agent/reducing agent couple. The paper according to the invention contains iron(III) and a product giving a complex coloured with iron(II). Any attempt to falsify by chemical means provokes the reduction of the iron(III) into iron(II) immediate- ly followed by the formation of the coloured complex. According to the invention, the complexing agent is preferably 2,2-bipyridyl. Another complexing agent is orthophenantroline.

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