This job's pantograph has what I call a 'cloud background' with the 'VOID' dots mixed in through it. (I can provide a scan of it if this will help. Welcome to the new website of the Jura company. Jura is specialized in developing and supplying graphic security software, hardware, design, banknote protection, personalization and training. Jura provides complete prepress solutions for the demands of high security printing worldwide for more than two decades.

In, void pantograph refers to a method of making and patterns in the background of a document. Normally these are invisible to the eye, but become obvious when the document is photocopied. Typically they spell out 'void', 'copy', 'invalid' or some other indicator message. Void pantographs work by exploiting the limitations and features of copying equipment. A scanner or photocopier will act as a on the original image, blurring edges slightly. It will also not be perfectly aligned with the directions of the document, causing. Features smaller than the resolution will also not be reproduced.

In addition, human vision is sensitive to. This means that if a grey region consists of a grid of very small dark dots the filtering will produce a lighter grey, while a region of larger dots will be affected differently ('big-dot-little-dot'). This makes it possible to see a pattern that had been invisible. Numerous variations exist, including printing the marks using a raster of lines in one direction on a background of lines in another direction, or using fine line patterns that alias into a visible when copied. References [ ].

Aronoff, Steven J. Simske, Margaret Sturgill. Automated Optimization of Void Pantograph Settings.

HP Laboratories HPL-2011-179 • J. Lee and J Choi, 'Development of Visible Anticopy Patterns,' in TrustBus 2004, LNCS 3184, pp. 209-218 (2004) • John R. Printing method and copy-evident secure document. US patent 5487567 • George K. New Digital Anti-Copy/Scan and Verification Technologies. In: Optical Security and Counterfeit Deterrence Techniques V, San Jose, California; June 3, 2004; p.

Check Stock - Security Features Void Pantograph Toner Grip Paper - All Wellspring Software check stock is paper because writing a check should never expose your money to easy fraud. Paper chemically bonds the laser toner to the paper so that any modification of characters printed on the paper requires the actual paper fibers to be ripped away. This feature combined with the background patterns printed on the check stock make any attempt to alter information printed on a check much more noticeable. This type of check stock is available from some other check stock suppliers at an additional charge. Because of our commitment to quality and security, we provide only Toner Grip check stock for all of our checks.

VOID Pantograph - If the check is copied (especially on color copiers) the word VOID appears many times on the face of the copy. Rainbow Background - A special printing process is required to produce the two color background.

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This background is very difficult to copy using a color copy machine. Micro Printing - The line creating the border of the check is actually printed words: 'Wellspring Software'. This printing is too small to be copied on a photo copy machine and it is referenced on the front of the check with a security feature warning message. Watermark - On the back of the check is a watermark which can not be copied with a photo copy machine. Warning clauses are printed on the front and back of the check that reference this feature.