Home Glossary Spark orbital Spark orbital By keesingidacademy - 25/01/2018 85 An optically variable ink changes colour and brightness, giving the impression of dynamic movement. A bright ring can be seen moving around a central point of the image. + posts Varifeye Watermark Transparent ink Unique font RELATED ARTICLESMORE FROM AUTHOR Glossary Invisible Personal Information (IPI) Glossary 3D Photo Glossary Invisible Personal Information (IPI) Glossary Hotfoil Glossary Unique font Glossary UV Ink Must read 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