Security paper for producing documents

Details Security paper for producing documents Security paper for producing documents

B - Operations, Transporting

41

M

283/25, 42/9

B41M 5/124 (2006.01) B41M 3/14 (2006.01) D21H 21/46 (2006.01)

Patent

CA 2034000

2034000 9015190 PCTABS00002 A security paper can be used to produce documents which can be identified as genuine by means of a colour reaction system consisting of a colour-forming component and a colour-developing component and based on the principle of pressure-sensitive duplicating paper. The colour-forming component is applied to the paper, which contains the colour-developing component, by means of a marking device. A number of drawbacks are associated with known security systems for documents based on the principle of pressure-sensitive duplicating paper. The aim of the invention is to overcome these drawbacks. To this end, the security paper is placed in contact with a marking liquid which contains a colour-forming component. The reaction between the colour-developing component present in the paper and the colour-forming component occurs in the paper itself instead of on the surface as in conventional papers. The marking penetrates the paper and may even strike through on the other side, where it forms a mirror image. This marking cannot be removed from the document without destroying the document itself. A further major advantage of the invention is that a paper with an incorporated colour-developing component is a true security paper, i.e., comparable with conventional special papers (with fluorescent inlays, small engravings, watermarks, metal threads, etc.) which are note available to the general public. This appreciably enhances the security.

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