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 redundantly printed security-enhanced document comprising:
a substrate having a surface; and
variable indicia representing variable information, the variable indicia comprising a first variable indicium and a second variable indicium printed on a common area of the surface of the substrate,
the first variable indicum comprising a first component color,
the second variable indicum comprising a different second component color,
each of the first and second component colors having a grayscale equivalent level equal to or greater than a grayscale equivalent level of the surface of the substrate plus an additional contrast delta of at least 15%,
the first and second component colors printed in register to form a common process color indicum on the surface on the substrate, the common process color indicum having a grayscale equivalent level equal to or greater than the grayscale equivalent level of the surface of the substrate plus the additional contrast delta, and
such that each of the first and second component colors printed on the common area by itself indicates the same variable information represented by the variable indicia.
2. The redundantly printed security-enhanced document of claim 1 , wherein the first and second component colors each comprise either cyan, magenta, yellow, or black.
3. The redundantly printed security-enhanced document of claim 1 , wherein the first and second component colors comprise spot colors.
4. The redundantly printed security-enhanced document of claim 1 , wherein the variable information comprises an intended value of the redundantly printed security-enhanced document.
5. The redundantly printed security-enhanced document of claim 1 , wherein the variable indicia comprise an alpha-numeric character.
6. The redundantly printed security-enhanced document of claim 1 , wherein the variable indicia comprise an icon or a figure.
7. A redundantly printed security-enhanced document comprising:
a substrate having a surface; and
variable indicia representing variable information, the variable indicia comprising a first color and a different second color printed on adjacent areas of the same surface of the substrate,
the first and second colors having a grayscale equivalent level relative to the substrate with a contrast delta of at least 15% grayscale equivalent,
the first and second colors printed in register forming a color indicum and an associated background, and
such that each of the color indicum and the associated background by itself indicates the same variable information represented by the variable indicia.
8. The redundantly printed security-enhanced document of claim 7 , wherein the first or second colors are process colors.
9. The redundantly printed security-enhanced document of claim 8 , wherein the first or second colors comprise a combination of cyan, magenta, yellow, or black.
10. The redundantly printed security-enhanced document of claim 7 , wherein the first or second colors are spot colors.
11. The redundantly printed security-enhanced document of claim 7 , which is one of a plurality of redundantly printed security-enhanced documents, and wherein for at least two of the redundantly printed security-enhanced documents, the first and second colors are inverted.
12. The redundantly printed security-enhanced document of claim 7 , which is one of a plurality of redundantly printed security-enhanced documents, wherein the first and second spot or process colors are inverted base on a random determination for the plurality of redundantly printed security-enhanced documents.
13. A redundantly printed security-enhanced document comprising:
a substrate having a surface; and
variable indicia representing variable information, the variable indicia comprising a first color and a different second color that are printed on adjacent areas of the same surface of the substrate, and
each of the first and second colors having a grayscale equivalent level relative to the substrate with a contrast delta of at least 25% grayscale equivalent, the first and second colors forming a color indicum and an associated background,
such that each of the color indicum and the associated background by itself indicates the same variable information represented by the variable indicia.
14. The redundantly printed security-enhanced document of claim 13 , wherein the first or second colors are process colors.
15. The redundantly printed security-enhanced document of claim 14 , wherein the first or second colors comprise a combination of cyan, magenta, yellow, or black.
16. The redundantly printed security-enhanced document of claim 13 , wherein the first or second colors are spot colors.
17. The redundantly printed security-enhanced document of claim 13 , which is one of a plurality of redundantly printed security-enhanced documents, and wherein for at least two of the redundantly printed security-enhanced documents, the first and second colors are inverted.
18. The redundantly printed security-enhanced document of claim 13 , which is one of a plurality of redundantly printed security-enhanced documents, wherein the first and second colors are inverted based on a random determination for the plurality of redundantly printed security-enhanced documents.
19. The redundantly printed security-enhanced document of claim 13 , wherein the variable indicia comprise an alpha-numeric character.
20. The redundantly printed security-enhanced document of claim 13 , wherein the variable indicia comprise an icon or a figure.