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%.

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%.

An article for laser marking can comprising: a thermoplastic composition comprising a thermoplastic polymer, an active component comprising at least one of a polymeric unit and an additive, wherein the thermoplastic polymer has a visible transmission of greater than or equal to 80% according to ASTM D1003-00, Procedure A, using D65 illumination, 10 degrees observer, and thickness of 1 mm; and a mark produced by chemical rearrangement of the active component generated by a laser of a first wavelength; wherein the mark exhibits at least one of: (i) a change in optical properties in the region 400 nm to 700 nm when exposed to light having a wavelength less than or equal to 500 nm; and (ii) a change in optical properties in the region of 400 nm to 700 nm when exposed to light having a wavelength greater than or equal to the first wavelength.

An article for laser marking can comprising: a thermoplastic composition comprising a thermoplastic polymer, an active component comprising at least one of a polymeric unit and an additive, wherein the thermoplastic polymer has a visible transmission of greater than or equal to 80% according to ASTM D1003-00, Procedure A, using D65 illumination, 10 degrees observer, and thickness of 1 mm; and a mark produced by chemical rearrangement of the active component generated by a laser of a first wavelength; wherein the mark exhibits at least one of: (i) a change in optical properties in the region 400 nm to 700 nm when exposed to light having a wavelength less than or equal to 500 nm; and (ii) a change in optical properties in the region of 400 nm to 700 nm when exposed to light having a wavelength greater than or equal to the first wavelength.

A secure substrate may include a base layer and an opacity layer disposed above the base layer. An optional background layer may be disposed above the opacity layer. The secure substrate may further include an inkjet receptive layer. A first inkjet receptive layer may be disposed above the background layer, and a second inkjet layer may be disposed below the base layer. The opacity layer may include copper such as metallic copper flakes or other particles. The opacity layer may also include a binder material such as polyvinyl alcohol, and in some cases also carbon black, process black, or the like.

A method for providing scratch-off lottery tickets for sale remote from a POS location in a retail establishment includes configuring the tickets with a game play area having play characters covered by a scratch-off coating. A print characteristic is provided in the game play area that is optically scannable but not reproducible when photocopying the game play area. In a database, identification of the printed characteristic is linked to a computer file associated with the lottery ticket at a central lottery computer. An optically scannable random identifier is also provided in the game play area and is linked to the computer file. Upon presentation of the lottery ticket for purchase, the ticket or a scanned image of the ticket is analyzed to verify that the print characteristic is present in the game play area. The scanned image of the ticket is analyzed to verify that the random identifier assigned to the lottery ticket is present in the game play area of the scanned image.

A method for providing scratch-off lottery tickets for sale remote from a POS location in a retail establishment includes configuring the tickets with a game play area having play characters covered by a scratch-off coating. A print characteristic is provided in the game play area that is optically scannable but not reproducible when photocopying the game play area. In a database, identification of the printed characteristic is linked to a computer file associated with the lottery ticket at a central lottery computer. An optically scannable random identifier is also provided in the game play area and is linked to the computer file. Upon presentation of the lottery ticket for purchase, the ticket or a scanned image of the ticket is analyzed to verify that the print characteristic is present in the game play area. The scanned image of the ticket is analyzed to verify that the random identifier assigned to the lottery ticket is present in the game play area of the scanned image.

A security-enhanced document, such as an instant lottery ticket, includes a substrate. Indicia is provided on the substrate, and a scratch-off-coating (SOC) layer is applied over the indicia to maintain the indicia unreadable until removal of the SOC layer. The indicia is printed onto the substrate as pigmented particles. One or more opacity film layers may be provided over or under the pigmented particle indicia.

A security-enhanced document, such as an instant lottery ticket, includes a substrate. Indicia is provided on the substrate, and a scratch-off-coating (SOC) layer is applied over the indicia to maintain the indicia unreadable until removal of the SOC layer. The indicia is printed onto the substrate as pigmented particles. One or more opacity film layers may be provided over or under the pigmented particle indicia.

Disclosed herein is an electrostatic ink composition comprising a component selected from a fatty acid ester having a plurality of hydroxyl substituents and a fatty acid amide having a plurality of hydroxyl substituents. Also described herein are scratch-off structures and methods for producing them.