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https://doi.org/10.31803/tg-20191004140247

Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique

Vilko Žiljak*   ORCID icon orcid.org/0000-0002-1190-5003 ; Faculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, Croatia
Jana Žiljak Gršić   ORCID icon orcid.org/0000-0002-1190-5003 ; Zagreb University of Applied Sciences, Vrbik 8, 10000 Zagreb, Croatia
Denis Jurečić ; Faculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, Croatia
Tonči Jeličić   ORCID icon orcid.org/0000-0001-7129-0541 ; Hydrographic Institute of the Republic of Croatia, Zrinsko-Frankopanska 161, 21000 Split, Croatia

Puni tekst: engleski, pdf (1 MB) str. 311-314 preuzimanja: 100* citiraj
APA 6th Edition
Žiljak*, V., Žiljak Gršić, J., Jurečić, D. i Jeličić, T. (2019). Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique. Tehnički glasnik, 13 (4), 311-314. https://doi.org/10.31803/tg-20191004140247
MLA 8th Edition
Žiljak*, Vilko, et al. "Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique." Tehnički glasnik, vol. 13, br. 4, 2019, str. 311-314. https://doi.org/10.31803/tg-20191004140247. Citirano 06.06.2020.
Chicago 17th Edition
Žiljak*, Vilko, Jana Žiljak Gršić, Denis Jurečić i Tonči Jeličić. "Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique." Tehnički glasnik 13, br. 4 (2019): 311-314. https://doi.org/10.31803/tg-20191004140247
Harvard
Žiljak*, V., et al. (2019). 'Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique', Tehnički glasnik, 13(4), str. 311-314. https://doi.org/10.31803/tg-20191004140247
Vancouver
Žiljak* V, Žiljak Gršić J, Jurečić D, Jeličić T. Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique. Tehnički glasnik [Internet]. 2019 [pristupljeno 06.06.2020.];13(4):311-314. https://doi.org/10.31803/tg-20191004140247
IEEE
V. Žiljak*, J. Žiljak Gršić, D. Jurečić i T. Jeličić, "Near-infrared spectroscopy and hidden graphics applied in printing security documents in the offset technique", Tehnički glasnik, vol.13, br. 4, str. 311-314, 2019. [Online]. https://doi.org/10.31803/tg-20191004140247

Sažetak
The method of mixing pigments for the printing technology is expanded with the addition of dual states in security graphics. Near-infrared spectroscopy of colorants used in the offset technique has brought about the concept of targeted design by a selective use of colorants that are visible in the visible region of the electromagnetic spectrum. High-security documents have been observed in the NIR light based on twin colorants which are differentiated according to their NIR absorption in the range from 800 to 1000 nm. New procedures have been developed based on the innovative creation of documents with hidden information. Two graphics are combined with mutating screen elements. A mathematical definition of the new printing screen and an algorithm in PostScript are given. The designer plans and creates graphics, which originate from the twin colorants, by using the INFRAREDESIGN® method. The dual design was investigated using visual and infrared cameras for the forensic area. The components of colorants are determined by the spectroscopy of light absorption with filters in the visual and NIR spectrum.

Ključne riječi
hidden graphics; near-infrared spectroscopy; offset printing; security screen; twin colorants

Hrčak ID: 229500

URI
https://hrcak.srce.hr/229500

Posjeta: 198 *