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.
1. A redundantly printed security-enhanced document comprising:
a substrate and at least two different printed variable indicia directly or indirectly 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;
at least one component color variable indicium having a grayscale equivalent level greater than or equal to a predetermined minimum threshold of 25%, wherein the predetermined minimum threshold is expressed as a grayscale percentile equivalent, where a value of 0% denotes paper white (no ink) and 100% a solid black (full ink); and
the at least one process color variable indicium being comprised of a combination of component colors, each of at least two of the component color or combination of component color variable indicia exhibits a grayscale equivalent level greater than or equal to the predetermined minimum threshold of 25%,
wherein the component colors are printed to overlap with each other in a cumulative manner;
such that the failure of the printing of one portion of either or any of the at least two of the component colors of the printed 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 redundantly printed security-enhanced document of claim 1 , wherein the minimum threshold grayscale equivalent level indicia is adjusted to compensate for substrate color or shading.
3. The redundantly printed security-enhanced document of claim 1 , wherein each of the at least first printed variable indicia and the at least second printed variable indicia is four colors.
4. The redundantly printed security-enhanced document of claim 1 , wherein the information regards an intended value of the document.