Barcodes are commonly read to instantiate further software system tasks. The void pantograph 12 disclosed herein is such that it can be logically read as a barcode or other data-containing marker. Glyphs may be included in the void pantograph foreground 14, and thus will emerge in response to scanning. The glyphs will be segmented into regions. Automated Optimization of Void Pantograph Settings. Aronoff, Steven J. Simske and Margaret Sturgill, HewlettPackard Labs, 3404 E. Harmony Rd., MS 36, Fort Collins CO - 80528, USA. Void pantographs (VPs) have been an important part of the security printing toolkit for several decades. When crafted for a.

From Void Pantograph Glossary Term: Void Pantograph: A pantograph screen that has the word 'VOID' hidden in it, created by using special screens and background designs. PDF Void pantographs (VPs) have been an important part of the security printing toolkit for several decades. When crafted for a specific printing technology, VPs provide an almost 'magical. I made a copy on my photocopier and the hidden message did not appear. A One of the most popular security features - and the one that is the most undependable - is hidden message technology. This is the feature that is known as the 'VOID' pantograph or 'VOID' Background. Arcis Digital Security is the leading provider of void pantograph anti-copy technology as well as covert authentication document security features to the print industry. When it comes to traditional print processes such as offset sheet fed, web and flexographic print, we are the largest licensor of our patented Void Pantograph (VP) Technology. Pantograph 4000™ Pantograph 4000 is your first line of defense against fraud. This next-generation void pantograph technology has proven the most effective on the.

Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evidentlabels, security tapes, product authentication, stock certificates, postage stamps and identity cards. The main goal of security printing is to prevent forgery, tampering, or counterfeiting. More recently many of the techniques used to protect these high-value documents have become more available to commercial printers whether they are using the more traditional offset and flexographic presses or the newer digital platforms. Businesses are protecting their lesser-value documents such as transcripts, coupons and prescription pads by incorporating some of the features listed below to ensure that they cannot be forged or that alteration of the data cannot occur undetected.

A number of technical methods are used in the security printing industry. Security printing is most often done on security paper, but it can also occur on plastic materials.

2Watermarks

Special substrate[edit]

The substrate of most banknotes is made of paper, almost always from cotton fibres for strength and durability, in some cases linen or speciality coloured or forensic fibres are added to give the paper added individuality and protect against counterfeiting. Some countries, including Canada, Nigeria, Romania, Mexico, New Zealand, Israel, Singapore, Malaysia, England and Australia, produce polymer (plastic) banknotes, to improve longevity. They may include transparent windows (up to 10 millimeters in diameter) as a security feature in areas which are not covered by the opacifying layer. Paper substrate may also include windows based on laser-cut holes covered by a security foil with holografic elements. All of this makes it difficult to reproduce using common counterfeiting techniques.

Transparent Windows
Recto of 1 Romanian Leu banknote (series 2005) with partially overprinted window on the left (polymer substrate)
Recto of 20 euro banknote (series ES2) with holografic foil over the window (upper right side) (paper substrate)
Verso of 20 euro banknote (series ES2) with holografic foil over the window (upper left side)

Watermarks[edit]

True watermarks[edit]

A true watermark is a recognizable image or pattern in paper that appears lighter or darker than surrounding paper when viewed with a light from behind the paper, due to paper density variations. A watermark is made by impressing a water coated metal stamp or dandy roll onto the paper during manufacturing. Watermarks were first introduced in Bologna, Italy in 1282; as well as their use in security printing, they have also been used by papermakers to identify their product. For proofing the authenticity, the thinner part of the watermark will shine brighter with a light source in the background and darker with a dark background. The watermark is a proven anti-counterfeit technology because most counterfeits are simulating its appearance by a printing pattern only.

Watermarks in Paper Substrate
Watermark in a postage stamp from Zululand (around 1900)
Watermark in a 100 Deutsche Mark (series BBk-IIIa) from Deutsche Bundesbank
Watermark in a 100 euro (series ES1) from European Central Bank
Watermark in a 5 euro (series ES2) from European Central Bank

Simulated watermarks[edit]

Printed with white ink, simulated watermarks have a different reflectance than the base paper and can be seen at an angle. Because the ink is white, it cannot be photocopied or scanned.^[1] A similar effect can be achieved by iriodin varnish which creates reflections under certain viewing angles only and is transparent otherwise.

Watermarks are sometimes simulated on polymer currency by printing an according pattern, but with little anti-counterfeiting effect. For example, the Australian dollar has its coat of arms watermarked on all its plastic bills. A Diffractive Optical Element (DOE) within the transparent window can create a comparable effect but requires a laser beam for its verifcation.

Intaglio printing[edit]

Intaglio is a printing technique in which the image is incised into a surface. Normally, copper or zinc plates are used, and the incisions are created by etching or engraving the image, but one may also use mezzotint. In printing, the surface is covered in ink, and then rubbed vigorously with tarlatan cloth or newspaper to remove the ink from the surface, leaving it in the incisions. A damp piece of paper is placed on top, and the plate and paper are run through a printing press that, through pressure, transfers the ink to the paper.

The very sharp printing obtained from the intaglio process is hard to imitate by other means. Intaglio also allows for the creation of latent images which are only visible when the document is viewed at a very shallow angle.

Geometric lathe work[edit]

A guilloché is an ornamental pattern formed of two or more curved bands that interlace to repeat a circular design. They are made with a geometric lathe.

Microprinting[edit]

This involves the use of extremely small text, and is most often used on currency and bank checks. The text is generally small enough to be indiscernible to the naked eye. Cheques, for example, use microprint as the signature line.

Enlarged microprinting
Recto of 100 euro (series ES1) (lower left)
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