Zaštitna grafika poštanskih maraka dualnim svojstvima bojila sa parametrom Z i individualiziranim rasterskim elementom

doctoral thesis

• Author: Maja Rudolf
• Mentor: Vilko Žiljak (mentor)
• Committee member: Vilko Žiljak (član povjerenstva)
• Committee member: Klaudio Pap (član povjerenstva)
• Committee member: Damir Boras (član povjerenstva)
• Committee member: Nikola Mrvac (član povjerenstva)
• Committee member: Đurđica Parac-Osterman (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2013-6-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology
• Universal decimal classification (UDC): 655 - Graphic industries. Printing. Publishing. Book trade

Abstract

U radu se postavljaju visoki standardi dizajna za tehnološku izvedu poštanskih maraka kao

vrijednosnica na bazi teorije Infraredesigna. Zbog stalne potrebe za novim zaštitama u borbi

protiv krivotvorenja, tisak je podređen korištenju inovacija i patenata. Rad je posvećen

višestrukoj zaštiti poštanskih maraka, kako bi se osigurala njihova autentičnost. Kreiraju se

zaštitni elementi temeljeni na tehnologiji skrivanja infracrvene Z slike unutar vidljive slike.

Modeliraju se rasterski elementi koji sudjeluju u kreiranju grafike u proširenom spektru od

400 do 1000nm. Konvencionalno rastriranje se zamjenjuje individualizirano dizajniranim

rasterskim elementima kako bi se postigla raspršenost rubova skrivene slike te na taj način

unaprijedilo sakrivanje čime se potvrđuje hipoteza da rasterski element sa bitmapiranim

elementom slike onemogućava krivotvorenje. Dizajn nove poštanske marke se izvodi

planiranim spot bojama sa Z parametrom. Izvode se detaljni proračuni novih Z spot bojila za

prošireni spektar u uvjetima ofsetnog tiska. Eksperimentalno je postavljena i dokazana

osmerobojna spot CMYKIR separacija sa četiri VS/IR blizanca boja. Definiraju se nove faze

dizajna za potrebe kreiranja dvostruke informacije. Daju se novi algoritmi u optimizaciji

grafika za vidljivi i infracrveni dio spektra. Izvedeno je šest modela CMYKIR separacije koji

odgovaraju na specifične probleme na koje se nailazi u različitim zahtjevima dizajna. Kroz

eksperimentalne primjere poštanskih maraka se detaljno analiziraju problemi kod realizacije

otisaka sa skrivenom grafikom. Na njih je primijenjena proširena teorija CMYKIR separacije.

Kombiniranjem takvih grafika sa individualiziranim rasterima dolazi se do potpunog

skrivanja infracrvene informacije u vidljivom dijelu spektra te se postiže vrhunska zaštita

poštanske marke, čime se potvrđuje hipoteza o nemogućnosti krivotvorenja. Ujedno se

udovoljava i visokim dizajnerskim zahtjevima za kreiranjem bogatih grafika te se postiže

dvostruko iskorištenje ograničenih dimenzija poštanske marke.

Abstract (english)

High standards are set up for printing technology of postage stamps, as security papers, based

on Infraredesign theory. Fighting the counterfeiters, there is a constant need for new security

features. Printing process is subject to utilization of innovations and new patents. This work is

dedicated to developing multilayered protection of postage stamps to ensure its' authenticity.

New protective features are designed, based on technology of hiding Z image in visible

image. Models of screening elements are set in the extended spectral area from 400 to

1000nm. Conventional screening is replaced with uniquely designed screens to produce

dispersion of edges of graphic. Such dispersion significantly improves hiding abilities. Design

of new postage stamp is carried out with planned spot colors with parameter Z. Eight color

spot CMYKIR separation with four VS/IR twin colors is set up and experimentally proven in

designing new postage stamp. Detailed calculations of Z spot colors are carried out, for

purpose of creating double information. New algorithms are given that deal with optimization

of graphics for visible and infrared part of the spectrum. Six new models of CMYKIR

separation are carried out that reply to specific problems which are encountered in various

design demands. Through experimental examples of postage stamps detailed analysis is

carried out of known issues in realization of prints with hidden graphics. Extended theory of

CMYKIR separation is applied to new postage stamps. Experimental examples of stamp

design use new Z spot colors in CMYKIR separation. Combining such graphics with

individualized screen shapes produces total hiding of infrared information in the visible part

of the spectrum. Protection of newly designed postage stamp is superior to existing protection

elements because it cannot be reproduced in a conventional way. At the same time, high

standards for designing rich graphics are satisfied. Also double space is gained for designing

information which is important because of limited dimensions of postage stamp.

• Keywords: poštanska marka; Z spot boje; individualizirani rasterski element; dvostruka grafika; bliski infracrveni spektar u tiskarstvu; steganografija
• Keywords (english): postage stamp; Z spot color; individual screen element; double graphics; near infrared spectrum in printing technology; steganography
• Language: croatian
• URN:NBN: urn:nbn:hr:216:044913
• Study programme: Title: Graphic engineering and graphic product design; Course: Graphic technology; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti u području tehničkih znanosti (doktor/doktorica znanosti u području tehničkih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-04-24 22:12:11