Naslov
Postage Stamps with hidden information in security Z values

Autori
Žiljak-Vujić, Jana ; Rudolf, Maja ; Morić, Branka ; Friščić, Martina

Izvornik
TTEM - Technics technologies education management (1840-1503) 8 (2013), 4; 1466-1473

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

Ključne riječi
infrared graphic ; Z value ; security print ; postage stamp ; camouflage image ; hidden information ; CMYKIR separation

Sažetak
With new technology of CMYKIR separation we create double space in design of postage stamp. The procedure is to connect the two images, visual and Infra information. Theme is divided to motif and its hidden context. Purpose of camouflage, double information is discussed and analyzed on small dimensions of postage stamp. New phases are defined in preparation of graphics for new methods of separation channels of graphics to obtain effect of infrared hidden images in visible picture. We introduce new technology of scanning in ultraviolet and infrared selections: 570, 715, and 850 nanometers. At the same time ultraviolet colorants are set with the migration from yellow to brown. Scanning is conducted with the barrier of UV 254 nm. With these methods of scanning we extend the tools for authenticating postage stamp as security paper. Two independent informations on a stamp are planned as graphical and printing solution with a goal of extending the quality of printing process and development of new security inks.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija

POVEZANOST RADA