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Machine Readable Travel Documents - ICAO

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III-6 <strong>Machine</strong> <strong>Readable</strong> <strong>Travel</strong> <strong>Documents</strong><br />

Additional features<br />

— If the core substance is paper it is desirable that it contains a watermark comprising two or more<br />

grey levels, preferably in register with printed design.<br />

— invisible fluorescent fibres and/or planchettes in core or laminate;<br />

— visible (fluorescent) fibres and/or planchettes 1 ;<br />

— security thread included in the card construction. The thread may incorporate special effects<br />

such as thermochromic, photochromic, optically variable or magnetic properties 1 ;<br />

— tactile feature on card outer surface.<br />

Note. — Where the core substrate used for the MRtd is formed entirely of plastic, it is usually not<br />

possible to incorporate the security components normally available in a paper substrate. In such cases<br />

additional security properties shall be included, including additional security printed features, enhanced<br />

personalization techniques and/or the use of optically variable features.<br />

5.2 Security printing<br />

5.2.1 Background and text printing<br />

Basic features<br />

Additional features<br />

— two-colour guilloche security background design pattern 2 ;<br />

— rainbow printing;<br />

— anti-scan pattern;<br />

— microprinted text.<br />

— duplex security pattern;<br />

— relief (3-D) design feature;<br />

— deliberate error (e.g. spelling) incorporated within microprint.<br />

1. The use of these features must not interfere with machine readability of the document in the B-900 band of the spectrum or with the<br />

legibility of the portrait, signature or other biographical data in the visual zone.<br />

2. Where the guilloche pattern has been computer-generated, the image reproduced on the document must be such that no evidence<br />

of a pixel structure shall be detectable. Guilloches may be displayed as positive images, where the image lines appear printed with<br />

white spaces between them, or as negative images, where the image lines appear in white, with the spaces between them printed.<br />

A two-colour guilloche is a design that incorporates guilloche patterns created by superimposing two elements of the guilloche,<br />

reproduced in contrasting colours.

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