Naslov
Connecting two images on the postage stamp with infrared protection

Autori
Žiljak Vujić, Jana ; Z.Stanimirović, Ivana ; Hoić, Ana

Izvornik
Technics technologies education management (1840-1503) 9 (2014), 4; 745-750

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
Postage stamp protection, CMYKIR separation, twin dyes, INFRARED-GRAPHICS, Z parameter

Sažetak
A poststamp represents the relation between a people and its place in space and time. It communicates hrough a distance, Poststamp is a medium that needs innovation with a reason. It is important that, visually and formally, it develops and improves originality. A stamp composes and interprets history in a unique way. A stamp offers an author a huge task of expression in a tight space. It also creates a large responsibility for it represents a country of publishing. The stamp presented in this work beside contributing the communication, we also employ the infrared protection of the printing paint using two images, and thus creating the mathematical model FS39 that enables bonding two images, both visual and infrared spectrum. Model FS29 respects the properties of a stamps protective paper, the paints processive offset dies properties, and the black die 40% coverage, enabling hiding the image in the visible spectrum. The regression relationas are also a model for twin paints being designed for the target group of the postage stamps created by the INFRARED-GRAPHICS method. The twin dyes have equal light absorption values inthe visual part of the spectrum althought their material structures are different. The dyes spectrums are being observed in three different areas. We applied the area between 700 and 800 nm as the sepparate area of dividing the twin dyes spectrum. Each twin dye spectrum continues itsgraphical image after 800nm, depending on its Z value, with which we measure its infrared component. The spectrums of all dyes, different twins, meet in two points at the position Z at 1000nm. The value of the visual only spectrum is zero. The infrared image inducing dyes have the absorption value 0, 1 which enables the hidden image to be detected by using the ZRGB camera. This article elaborates the principles on which the theory of twin dyes is based, and which are also the basis of exploring and applying the INFRARED-GRAPHICS in the security printing of postal stamps.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne tehničke znanosti

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