Svjetlosna postojanost četverobojnih i šesterobojnih HP Indigo otisaka

master's thesis

• Author: Stanko Eškinja
• Mentor: Igor Majnarić (mentor)
• Committee member: Igor Majnarić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2013-9-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

Abstract

Kako bi reprodukcija imala vrhunsku kvalitetu uz standardna CMYK bojila

otiskujemo i specijalna bojila, koja će povećati kvalitetu reprodukcije. Jedna od digitalnih

tehnika tiska koja to može postići je elektrofotografija s tekućim tonerom. Specijalne boje

koje se najčešće dodaju su narančasta i ljubičasta (IndiChrome tisak) jer je njihova

reprodukcija najlošija iz CMYK bojila. Ovim radom pokazat ćemo kako ultraljubičasto

elektromagnetsko zračenje utječe na postojanost otiska odnosno gamuta. Osmišljena je tako

studija će se isti otisak stariti u vremenskim intervalima od 6, 12, 24, 48, 96, 160 i 244 sata.

Nastale kolorne promjene detektirati će se kolorimetriskim mjerenjem. Na kvalitetu

reprodukcije utječe i podloga. Zbog toga su korištene i dvije karakteristične tiskovne podloge:

papir za umjetnički tisak Magno star Gloss i naravni (ofsetni) papir Maxio set. U

kolorimetrijskim mjerenjima vidljivo je da će se u duljim vremenskim intervalima postepeno

gubiti kolorna svojstva, tiskovna podloga utječe na kvalitetu reprodukcije tj. Papiri za ofsetni

tisak brže će se degradirati. Za analizirane tonove one nisu jednake. Tako se najviše mijenja

puni ton ljubičastog bojila (ΔE100%=21,58) dok se najmanje mijenja puni ton cijan bojila

(ΔE100%=1,85). Rastrirani tonovi se slično ponašaju te najbolji rezultat od svih rastiranih

tonova ima 80% RTV cijan (ΔE80%=2,25), a najgori 80% RTV ljubičasta (ΔE80%=24,30).

Abstract (english)

For reproduction to have high quality it is necessary to add special printing colours to

standard CMYK colours. One of digital printing techniques which can achieve high level of

precision is electrophotography with liquid toner. Special colours witch are usually add are

orange and violet (IndiChrome print), because there reproduction is the worst from standard

CMYK colours. The study shows how ultraviolet radiation (UV) effects on constancy of

colour gamut. It will be conceived as accelerated ageing same print in time intervals of 6, 12,

24, 48, 96, 160 and 244 hour. The resulting colour changes are detected using a colorimetric

measurement. Reproduction quality is also affected by printing substrate. For this reason are

used two typical printing substrates: fine art paper Gloss Mango star and natural (offset) paper

Maxio set. In colorimetric measurements is palpable that longer intervals of ageing prints will

lose their properties. For the analysed tones they are not equal. Thus, the most varied full tone

is purple dye ΔE100% = 21.58 while the least changing full tone is cyan (ΔE100% = 1.85).

Screened tones behave similarly, and the best result of all screened tones has 80% tone value

cyan (ΔE80% = 2.25), and the worst 80% tone value purple containing (ΔE80% = 24.30).

• Keywords: Šesterobojno otiskivanje; Elektorfotografija; Ubrzano starenje; Elektroink bojilo
• Keywords (english): Six-colour printing; Electrophotography; Accelerated ageing; Electroink
• Language: croatian
• URN:NBN: urn:nbn:hr:216:641555
• Study programme: Title: Graphic technology; specializations in: Graphic technology, Design of graphic products; Course: Graphic technology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije (sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-04-20 23:02:04