Patent ID: 7648842
Filing Date: 2010-01-19
Classification: B41M,Y10T

Abstract:
1. A security paper authenticating system comprising the combination of a security paper and an applicator with at least two authenticating solutions, the security paper containing a starch, a salt of iodine, and an acidic developer material, the applicator comprising a stylus with at least a dual element writing tip, wherein the first element of the writing tip communicates with a first chamber holding a first authenticating solution, and the second element of the writing tip communicates with a second chamber holding a second authenticating solution; the first authenticating solution comprising one or more of a sulfonamide and a copper salt dispersed in a solvent; the second authenticating solution comprising one or more of a leuco and fluoran dye precursor dispersed in a solvent; whereby on applying the dual authenticating solutions to authentic security paper, iodine is generated in situ from the reaction of the first authenticating solution and salt of iodine, and a first color of a starch iodine color is expressed; and whereby the second authenticating solution concurrently expresses a second color of a leuco or fluoran dye.