Home Glossary Optics Optics By - 25/01/2018 48 A wide (though no wider than 18mm) vertical strip with a transparent window featuring a continuous security thread on both sides, usually with microprint. + posts Windowed Asymetric print Aurora Barcode watermark RELATED ARTICLESMORE FROM AUTHOR Glossary Invisible Personal Information (IPI) Glossary 3D Photo Glossary Invisible Personal Information (IPI) Glossary Hotfoil Glossary Varifeye Glossary Watermark Related Content Designing identity documents Nick Nugent - 01/10/2015 0 Identities in the blockchain Peter Hoogendoorn - 08/10/2018 0 Designing better banknotes Dr Andrea Firth - 01/10/2011 0 The golden harmony of Fibonacci Anton Bleikolm - 01/02/2012 0 Does money make you ill? Marcus Riemann - 01/10/2014 0 Load more