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New Postage Stamp Design With Tone Gradation in Infrared Design Technology

Maja Rudolf   ORCID icon orcid.org/0000-0002-3959-952X ; Faculty of Graphic Arts, University of Zagreb, Croatia
Tajana Koren ; Faculty of Graphic Arts, University of Zagreb, Croatia
Jana Žiljak-Vujić ; Polytechnic of Zagreb

Puni tekst: engleski, pdf (2 MB) str. 57-64 preuzimanja: 343* citiraj
APA 6th Edition
Rudolf, M., Koren, T. i Žiljak-Vujić, J. (2012). New Postage Stamp Design With Tone Gradation in Infrared Design Technology. Acta graphica, 23 (3-4), 57-64. Preuzeto s https://hrcak.srce.hr/101924
MLA 8th Edition
Rudolf, Maja, et al. "New Postage Stamp Design With Tone Gradation in Infrared Design Technology." Acta graphica, vol. 23, br. 3-4, 2012, str. 57-64. https://hrcak.srce.hr/101924. Citirano 31.07.2021.
Chicago 17th Edition
Rudolf, Maja, Tajana Koren i Jana Žiljak-Vujić. "New Postage Stamp Design With Tone Gradation in Infrared Design Technology." Acta graphica 23, br. 3-4 (2012): 57-64. https://hrcak.srce.hr/101924
Harvard
Rudolf, M., Koren, T., i Žiljak-Vujić, J. (2012). 'New Postage Stamp Design With Tone Gradation in Infrared Design Technology', Acta graphica, 23(3-4), str. 57-64. Preuzeto s: https://hrcak.srce.hr/101924 (Datum pristupa: 31.07.2021.)
Vancouver
Rudolf M, Koren T, Žiljak-Vujić J. New Postage Stamp Design With Tone Gradation in Infrared Design Technology. Acta graphica [Internet]. 2012 [pristupljeno 31.07.2021.];23(3-4):57-64. Dostupno na: https://hrcak.srce.hr/101924
IEEE
M. Rudolf, T. Koren i J. Žiljak-Vujić, "New Postage Stamp Design With Tone Gradation in Infrared Design Technology", Acta graphica, vol.23, br. 3-4, str. 57-64, 2012. [Online]. Dostupno na: https://hrcak.srce.hr/101924. [Citirano: 31.07.2021.]

Sažetak
This paper deals with the application of new steganographic methods in postage
stamp printing technology with the goal of securing them against counterfeiting.
Postage stamp designs are presented which contain double information in the visible
and in the infrared spectrum area. New methods include printing with process
printing inks that have a continuous response in the infrared area of the spectrum.
The infrared Z image cannot be produced with conventional CMYK separation
in such a way that the hidden picture does not show through when looking at the
print. This is the reason for introducing CMYKIR separation, with mathematical
relations that respect printing ink characteristics in the RGB to CMYKIR system
conversion.
A mathematical model with targeted separation characteristics is proposed, with
seven independent variables. It has been created as the result of optimal regression
model developed on the basis of colour tone measuring for the visual and infrared
spectrum. A technological procedure has been elaborated for producing and printing
based on such designs. It is possible to detect the infrared image with the help
of a device – the infrared ZRGB camera. Counterfeiting is impossible due to the
irreversible conversion of the CMYKIR separation into the RGB system applied in
contemporary scanners or cameras.

Ključne riječi
Postage Stamp; Double Image; CMYKIR; Infrared Technology; Z Parameter

Hrčak ID: 101924

URI
https://hrcak.srce.hr/101924

Posjeta: 604 *