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U.S. Patent No. 7,196,822 - Amgraf’s Patented Graphical Security Document Technology
Capture any image such as a corporate logo, a photograph, or a key word or phrase, and convert that image into a LogoDot
halftone dot that replaces conventional round dots typically used in traditional printing. When compared to conventional halftone dots, LogoDots are much
more difficult to faithfully reproduce with commercial photocopiers and scanners, resulting in easily detectable copies. Contact Amgraf to request a
free sample kit containing examples of documents protected by LogoDot technology.
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Preview the dot image as the density progresses from 0% (white) to 100% (black).
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10%
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15%
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20%
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25%
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30%
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35%
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40%
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45%
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50%
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55%
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60%
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Examples of LogoDots created from corporate logos, photographs, and key words or phrases.
Use LogoDots to create self-canceling "Void" background patterns.
Original Document Protected by Logodot
Color Copy of Document Shows Void Message
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