Glossary

A type of marker directly embedded within video, audio or print content, which is imperceptible to humans but readable by computers.Typically used to identify ownership of copyright and authenticate a genuine article.

A part of the production process of many security papers that uses pressure through a wire mesh to form designs or patterns by varying the thickness of the paper.

A photonic watermark for banknotes, developed by combining a invisible photonic printing with a translucent and ultra-thin magnetic-responsive photonic display film.

A property of electromagnetic radiation that denotes the distance between waves of light.

A mathematical means for performing a signal analysis when signal frequency varies over time.

A continous roll of flexible material, usually paper, foil, film or laminate in a roll form.

Involves the feeding of a continuous roll (or web) of paper through the printing press. Web-fed offset lithography (as opposed to sheet-fed offset) is the predominant print process for tax stamps and other security labels.

An indirect lithographic printing process where a flat printing plate prints onto a rubber blanket that transfers the image onto the paper. The printing plate must be moistened with water before it is inked, with the water adhering to the non-image area.

The severe polishing of a coin in an attempt to improve its appearance and saleability to the uninformed.

A paper-embedded security thread surfacing at regular intervals in a document and full visible when viewed in transmission.

A slight flange (protruded rim) on coins or medals caused by heavy striking pressure, often characteristic on proof coins.

A metal punch used to impress images into coins.