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
Fibers are randomly dispersed in paper. Visible fibers differ in color from the base material. Invisible fibers become visible when excited by a specialized light source like UV or IR.
Similar to fibers, planchettes are added directly to paper. Planchettes are normally produced in a geometric shape, and can be a carrier for such things as Taggants. Planchettes can also be simulated by printing directly on the substrate.
A thin ribbon that is threaded or woven through paper. The public is likely most familiar with the use of threads in currency. Threads may also be taggant carriers and fluoresce when excited.
A watermark is a recognizable image or pattern in paper or plastic cards that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), created by thickness and density variations in the paper or plastic cards. There are two main types of watermark, the…
A transparent section of a paper or polymer substrate that enables light to pass through. The window can be used as a platform for additional security features such as an DOVID.
