However, when a color copy 12 of the original document is printed, the word “VOID” is visible to the unaided human eye in the color copy 12.Īn advantage of UV void pantographs is that a counterfeiter will not likely see the watermark the watermark will only appear when inspected under UV light. The security mark shown in the example includes the word “VOID,” but this word is not visible to the human eye in the original document 11. 1, in which an original document 11, such as a bank check, has a security mark printed on it. The features of pantograph marks will be described below, but by way of example it is common to print a “void” pantograph mark on a document so that certain content of the security mark is not visible to the unaided human eye on the original, but the content will be visible on a copy of the original. An example of such a mark is a pantograph mark. For example, financial instruments such as checks, event admission tickets and other documents for which it is important to visually distinguish the original from a copy may include such security marks. In some situations, document creators may wish to encode a security mark in a document in a way that is invisible to the human eye, but which becomes visible when the document is copied. In situations such as official or government document printing, event ticket printing, financial instrument printing and the like, many printed materials must be protected against copying, forging and/or counterfeiting. Security is an important requirement in many printing applications.
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