A security agent that is sensitive to chemicals like solvents and bleach that are commonly used to remove and subsequently alter print. When attacked, sensitized surfaces may run, bleed, stain, reveal hidden text, change color or even disappear to show evidence of tampering. Original document Tampered document
A covert machine-readable code or data that can carry unique or personalized information useful for security and rights management applications in digital and analog media content.
The process of removing material from a solid surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. In printed documents, this results in an image, number or code being created by burning the ink from a solid inked area,…
A process for blackening special plastic layers by heating them with a laser. Laser engraving is the inscribing of information into a substrate, such as a plastic card by means of burning the substrate with, for instance, a CO2 or Nd-Yag laser beam (laser ablation). Laser engraving allows the personalization of the plastic card. Matrix…
A code or characters that can be read by a machine, that can carry unique or personalized information useful for proof of authenticity and other security and rights management applications in digital and analog media content. Machine readable characters can be visually readable specific type fonts, such as OCR characters or the OCR-B characters of…
Multiple occurrences of the same image or information on a document to complicate alterations. Further repetition of the same information can lead to data errors.
A security ink containing dyes designed to penetrate the substrate (usually paper) so that any attempt at mechanical erasure will cause visible damage to the document. These inks are very difficult to remove from a document without causing damage. They are commonly used to prevent forgers from manipulating data on a document. The inks are…
These inks contain a security agent that is sensitive to chemicals commonly used to alter documents, e.g., polar and non-polar solvents and bleach. Any attempted chemical attack will cause sensitized surfaces to run, bleed, stain, reveal hidden text, change color or even disappear, indicating tampering.
This ink produces a transparent or white image on a substrate. Rubbing the printed area with the edge of a coin or metal object can reveal the image. Coin reactive ink cannot be copied and provides immediate verification of a document’s authenticity without the use of any specialized devices. Effect from rubbing the printed area…
Erasable inks are generally used in the printing of background artwork. When an attempt is made to mechanically alter or erase information, the artwork is removed in that area. Erasable inks are designed to react in the same manner as solvent or chemical reactive inks. Scenic or pantograph backgrounds on checks are commonly printed with…
