Clone-proof monetary and security documents and preparation thereof

A clone proof document as claimed in claims, 10 to 22 wherein the particulate deposition identifier (400) metal mixing ink composition comprises of In another embodiment the particulate deposition of UV ink comprises

• acrylated oligomer mixture in the range of 25 to 72% by weight,
• N-Vinyl-2 Pyrrolidone(NVP) in the range of 10 to 30% by weight,
• acrylated monomer mixture in the range of 4 to 18% by weight,
• 2-Phenoxyethanol acrylate in the range of 4 to 16% by weight,
• photo Initiators in the range of 2 to 15% by weight,
• carbon black in the range of 0.8 to 14% by weight.
• wherein the specific gravity of the composition is in the range of 1.0 to 1.6, curing condition for this ink composition is in the range of 200-400 Watt/cm.

A method of assigning a signature to a clone proof document which comprises a substrate provided with a particulate composition as an identifier at a predetermined location on the substrate, a barcode and/or image as an associated identifier,

• wherein there is a unique functional relation between the two said identifiers of the substrate, said method comprising assigning a signature ti the particulate based composition identifier is steps of:
• creating reference coordinate system by printing fiducial marks on top of the particulate composition identifier (400) so that an origin and orientation can be determined for the fiducial marks;
• capturing magneto-optical image from the particulate based composition (400) with the aid of a magneto-optic reading system (40);
• dividing the said image into multiple regions using the fiducial marks as a coordinate system;
• checking the said magneto-optical image in a said data capture system (2) database as its full reference signature for a particular substrate;
• creating a partial magneto-optical reference signature;
• compressing and encoding the said partial reference signature into a barcode (500 FIG. 5)) that is printed on the substrate (415);
• wherein by reconstructing the partial reference signature from the barcode (500) printed on the substrate (415) and matching against a newly acquired magneto-optical signature, a reading system associated with the clone-proof document may determine whether the two match or correlate without using the full reference signature stored in the system database;
• reading the particulate based composition using magneto optic reading system and the barcode after printing for verification purposes using a reading system of the print verification station (23) so as to match the newly captured partial signature (by the reading system) against the partial reference signature reconstructed form the barcode during the substrate printing process.