Instant ticket redundancy via multi-chromatic indicia
A redundantly printed security-enhanced document, printing method and system ensure the meaning of the information imparted by variable indicia printed by redundant printing on the document with removable scratch-off coatings. By printing the variable indicia with multiple colors, redundancy and integrity of the intended indicia is achieved. Additionally, inverted color indicia countermeasures to pinprick attacks are also disclosed. The redundantly printed document, methods and systems enhance the overall appearance of the redundantly printed document, and reduce possible consequences resulting from misprinted variable indicia. The resultant printed process color indicia maintains a grayscale equivalent level of a process color greater than or equal to the measured grayscale equivalent level of the substrate surface plus an additional contrast delta of 15%.
1. A method of producing a redundantly printed security-enhanced document comprising a substrate and at least two different printed variable indicia directly or indirectly printed on the substrate having a general area, the variable indicia being imaged indicia which provide variable information regarding the document, the at least two different printed variable indicia having at least one component color in the same general area of the substrate as at least second printed variable indicia printed of a different component color, the at least first printed variable indicia component color and the at least second printed variable indicia different component color being present so as to be printed in register to produce resulting redundant process color indicia, the method comprising:
(a) measuring the grayscale equivalent level of the substrate surface on which the variable indicia is to be imaged;
(b) measuring the grayscale equivalent level of the component colors of the variable indicia;
(c) printing each component color of the variable indicia with separate physically distinct print heads;
(d) selecting the resultant printed process color indicia so that the resultant printed process color indicia maintains a grayscale equivalent level greater than or equal to the measured grayscale equivalent level of the substrate surface plus an additional contrast delta of 15%; and
(e) selecting each of the at least two separate printed component colors or combination of component colors of the variable indicia so that each of the at least two separate printed component colors or combination of component colors of the variable indicia exhibit a grayscale equivalent level greater than or equal to the measured grayscale equivalent level of the substrate surface plus an additional contrast delta of 15%;
such that the failure of the printing of one portion of either or any of the at least two printed component colors of the variable indicia does not alter a meaning of the information of the document represented by the variable indicia on the redundantly printed security-enhanced document.
2. The method of claim 1 , further comprising printing each of the at least first printed variable indicia and the at least second printed variable indicia in four colors.
3. The method of claim 1 , wherein the information regards an intended value of the document.
4. The method of claim 1 , wherein the printed indicia is an alphanumeric character.
5. The method of claim 1 , wherein the printed indicia is an icon or figure.