https://en.bharatpedia.org/w/index.php?action=history&feed=atom&title=Security_threadSecurity thread - Revision history2026-08-01T16:33:33ZRevision history for this page on the wikiMediaWiki 1.43.6https://en.bharatpedia.org/w/index.php?title=Security_thread&diff=431625&oldid=prevAjay Kumar: Created a new article2023-10-01T06:43:42Z<p>Created a new article</p>
<p><b>New page</b></p><div>{{short description|Security feature of banknotes}}<br />
[[File:US $20 under blacklight.jpg|thumb|right|The security thread in a [[United States twenty-dollar bill]], glowing under a [[blacklight]]]]{{More citations needed|date=April 2021}}<br />
A '''security thread''' is a security feature of many [[banknotes]] to protect against [[counterfeit]]ing, consisting of a thin ribbon that is threaded through the note's [[paper]].<ref>{{cite web| title=Secret service| url=http://www.secretservice.gov/money_design_features1990.shtml| url-status=dead| archiveurl=https://web.archive.org/web/20090118093705/http://www.secretservice.gov/money_design_features1990.shtml| archivedate=2009-01-18}}</ref><br />
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Usually, the ribbon runs vertically, and is "woven" into the paper, so that it at some places emerges on the front side and at the remaining places at the rear side of the paper. Usually, it is made of [[metal]] [[Foil (chemistry)|foil]], but sometimes of [[plastic]]. Often, it has some text or numbers (e.g., the denomination) [[engraving|engraved]]. <br />
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Threads are embedded within the paper fiber and can be completely invisible or have a star burst effect, where the thread appears to weave in and out of the paper when viewed from one side. However, when held up to the light, the thread will always appear as a solid line. Features can be built into the thread material e.g., [[microprinting]] on a transparent plastic thread or adding materials so they [[fluorescence|fluoresce]] under [[ultraviolet|ultraviolet light]].<br />
The thread is a difficult feature to counterfeit but some counterfeiters have been known to print a thin grey line or a thin line of varnish in the area of the thread.<br />
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Security threads can also be used as an anti-counterfeiting device in [[passport]]s. They are generally made of plastic and contain microprinting.<br />
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== References ==<br />
{{reflist}}<br />
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[[Category:Banknotes]]<br />
[[Category:Money forgery]]<br />
[[Category:Currency production]]<br />
[[Category:National Security Agency]]<br />
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{{Banknote-stub}}</div>Ajay Kumar