Indelible ink formulation

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 11/20 (2006.01) B41M 3/14 (2006.01)

Patent

CA 2122862

Abstract of the disclosure NEW INDELIBLE INK FORMULATION A stable indelible colored ink composition for invalidating bank notes or similar valuables by staining them permanently, comprises at least one of di- or tri- phenylguanidine.

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